Engine Stamp Opinions and More
There is a 69 427 Roadster on eBay located here: https://www.ebay.com/itm/1969-Chevro...19.m1438.l2649
The 3rd picture in the ad is the engine stamp. Please share your thoughts with regards to the legitimacy of the stamping, along with any other observations you have about the car in general. One thing I noticed that I've never seen, the driver's door panel has a window crank, while the passenger side has an power window switch on the panel.
Thanks!
Last edited by ZRXGreen; Jan 20, 2018 at 08:32 AM. Reason: Added info
The photo is a pretty poor one to use a basis for a decision about the pad and stamps.
Does it appear to you as if the surface of the pad under the end of the vin derivative has had some work done to it?
Are the # of bids and the bid price an indication of what people think?
Aren't real 69 bb convertibles worth a good bit more than that?
Regards,
Alan
Last edited by Alan 71; Jan 20, 2018 at 08:46 AM.
I'm so new to this that I'm at great risk of embarrassing myself with any analysis, but here goes: It looks like the last 5 digits of the VIN derivative don't match the first 4 as the last 5 appear to be spaced out and sized differently. Finally, it looks like there might be some marring there on the pad itself, although I'm not sure. Apologies for my ignorance here, that's why I'm reaching out. Again, I appreciate any and all opinions.
Last edited by ZRXGreen; Jan 20, 2018 at 09:02 AM. Reason: Grammar





The 5600 redline on the tach agrees with the LL suffix on the engine stamp pad. L36 390hp. VIN says build date between Sept 68 and Jan 69. Trim tag says November 9th. Someone will probably call me out if I'm mistaken (and I would appreciate it).
Didn't see any obvious signs of rust around the VIN tag on the pillar - a few I looked in person definitely set off alarms by showing rust bleeding in around that area. It really didn't look to me like anyone fiddled with the engine stamp but it's hard to tell from one photo.
I saw a '68 that could be that car's twin this past summer at a show and it was blatantly obvious it was a Frankenstein to everyone except the guy who laid out $38K for it. At a glance it looks like the curtains match the carpet.
IMO if you are not a collector and are looking for a driver then one advantage matching #s gets you is at least you have some idea what you have. Not trying to touch off a fire here - matching #s is one of those things that goes round and round.
Yes, the electric window is goofy but not the end of the world. I like the hard top. The seller does appear to be showing a fair amount of detail underneath - many do not.
I wouldn't buy a car without inspecting it myself first. I'd go take a look at this one if I wanted to bid on it. I would not buy one sight unseen. Just me.
Here's an example of what I believe was the type of gang holder used for the vin stamp on the engine pad.
Since the transmission was stamped at the same time, with the same gang holder, it would be interesting to see that stamp. It might shed some light on the engine pad stamp.
There were reasons pads were ground and re-stamped... but it takes some experience to sort out what might have been done at St.Louis or at some later time.
I'll repeat... aren't real bb, 69, convertibles, typically worth more than what this car has been bid to? Why?
Regards,
Alan
As you can see the 3rd character from the left isn't quite lined up.
Last edited by Alan 71; Jan 20, 2018 at 10:57 AM.
The 5600 redline on the tach agrees with the LL suffix on the engine stamp pad. L36 390hp. VIN says build date between Sept 68 and Jan 69. Trim tag says November 9th. Someone will probably call me out if I'm mistaken (and I would appreciate it).
Didn't see any obvious signs of rust around the VIN tag on the pillar - a few I looked in person definitely set off alarms by showing rust bleeding in around that area. It really didn't look to me like anyone fiddled with the engine stamp but it's hard to tell from one photo.
I saw a '68 that could be that car's twin this past summer at a show and it was blatantly obvious it was a Frankenstein to everyone except the guy who laid out $38K for it. At a glance it looks like the curtains match the carpet.
IMO if you are not a collector and are looking for a driver then one advantage matching #s gets you is at least you have some idea what you have. Not trying to touch off a fire here - matching #s is one of those things that goes round and round.
Yes, the electric window is goofy but not the end of the world. I like the hard top. The seller does appear to be showing a fair amount of detail underneath - many do not.
I wouldn't buy a car without inspecting it myself first. I'd go take a look at this one if I wanted to bid on it. I would not buy one sight unseen. Just me.
The Best of Corvette for Corvette Enthusiasts
if so be prepared to spend close to double what this car is bid up to.
this looks to be a dealer.. his reserve will be nowhere near the 25K bid currently.
25K is a nice price for a NOM big block convertible with good paint and this car's several questionable characteristics.
what is that gizmo in front of the carb? its on 1 pic and not another?
Here's an example of what I believe was the type of gang holder used for the vin stamp on the engine pad.
Since the transmission was stamped at the same time, with the same gang holder, it would be interesting to see that stamp. It might shed some light on the engine pad stamp.
There were reasons pads were ground and re-stamped... but it takes some experience to sort out what might have been done at St.Louis or at some later time.
I'll repeat... aren't real bb, 69. convertibles worth substacially more than what this car has been bid to? Why?
Regards,
Alan
As you can see the 3rd character from the left isn't quite lined up.

Your info on the gang holder is very helpful! Great info on the fact that the trans would have been stamped with the same stamp gang. Thank you for pointing out that the one character doesn't line up. For someone like me, this is just building my knowledge base, which is exactly what I need!
Last edited by ZRXGreen; Jan 20, 2018 at 10:14 AM.
if so be prepared to spend close to double what this car is bid up to.
this looks to be a dealer.. his reserve will be nowhere near the 25K bid currently.
25K is a nice price for a NOM big block convertible with good paint and this car's several questionable characteristics.
what is that gizmo in front of the carb? its on 1 pic and not another?
Although I'm not looking for the perfect car, by any means (I couldn't afford it), I do want it to have the original engine. I appreciate your input--as I said, I just don't know much about big block car values.
The hardtop has pointy round bayonets that drop into the holes which I believe are adjustable - screw in/out for length. There is a center front clamp on the hardtop that also has a small bayonet and matches up to a small plate in the middle/top of the windshield frame.
Mine's a convertible and it uses the same attachment method. My hardtop's in primer - and as cool as they look it's not the easiest thing to take on & off. I was thinking I'd have to come up with a pulley system to do it myself or keep bugging my neighbor.
Personally, I would look for a private sale. For a driver if someone produces a receipt for the crate engine the car has in it I'd be happy with that.
"Alan, when you say that a BB 69 convertible would be worth substantially more, what price range would that be?"
I think a non rusty, 69, real big block, convertible, with it's original motor, and no stories, and in good condition, is an easy $50,000 car.
$65,000 to $75,000 for an especially nice car with a judging history.
Regards,
Alan
Last edited by Alan 71; Jan 20, 2018 at 11:05 AM.
"Alan, when you say that a BB 69 convertible would be worth substantially more, what price range would that be?"
I think a non rusty, 69, real big block, convertible, with it's original motor, and no stories, and in good condition, is an easy $50,000 car.
$65,000 to $75,000 for an especially nice car with a judging history.
Regards,
Alan
Does anyone have any suggestions on how to calculate what the 68-72 cars actually sell for? The only thing I am aware of is sorting eBay listings by "sold."
the sanding marks on the pad have perhaps obliterated the broach marks. the fonts and depth of the character strike and character spacing would have to be further researched.
see if the stamp matches the transmission.
check the casting date code of the block, and the casting date code of all the other parts to line up with the build date of the car..
know and understand that a major subset of these cars do not have the original engine and that so many of them are faked.
a non original engine car can pass all points in engine judging and an original engine car may not pass any of the engine judging.
A good knowledgeable sleuthing of the car can almost always unravel their high end claims.
except for the super rare optioned cars, an original engine car will not appreciate any faster than a NOM car. you just have to buy in at the right price.
these cars rust and can cause the rookie who states that they want an original engine to make a major mistake.
the sanding marks on the pad have perhaps obliterated the broach marks. the fonts and depth of the character strike and character spacing would have to be further researched.
see if the stamp matches the transmission.
check the casting date code of the block, and the casting date code of all the other parts to line up with the build date of the car..
know and understand that a major subset of these cars do not have the original engine and that so many of them are faked.
a non original engine car can pass all points in engine judging and an original engine car may not pass any of the engine judging.
A good knowledgeable sleuthing of the car can almost always unravel their high end claims.
except for the super rare optioned cars, an original engine car will not appreciate any faster than a NOM car. you just have to buy in at the right price.
these cars rust and can cause the rookie who states that they want an original engine to make a major mistake.
I guess the best thing I can say about how I'm trying to approach my future purchase is that I'm not doing it alone and that I'm not trying to rush it. I have friends and acquaintances I know that are way more knowledgeable than I'll ever be that are willing to help me figure all this out. And then of course, I have this board, which enlists the power of thousands of people who have the opportunity to help also. I'm doing the best I can!












