You're correct. They did. The LT1s have solid lifter 350s.

 

So is the 350/350 a solid lifter engine? I think these heads are the LT1 heads with the 2.02/1.60 valves, straight plugs, and drilled for accessories. But not sure. I think the heads are 1970? I know the block is a 1973.

 

350/350s (L46) are high compression (11:1) raised top piston, hydraulic lifter engines.

 

With all due respect, how would any of us know what a previous engine builder did to your engine? You've identifed the block and heads; you know it's a 350. Why not trot it down to a dyno somewhere and see what she pulls?

 

If us C3 guys are so dumb, why not ask your C2 brainiac buddies?

 

Well, because it seems to be a C3 motor? I didn't realize other members were not allowed in the other areas of this forum. I am looking here for knowledge not snide remarks. If you read the post you would realize this is probably a replacement (CE) motor from the factory and not a custom built engine. But thanks for your wisdom. BTW

 

If you were to read the posts above (that people took their own personal time to put here for you), this is NOT a replacement motor from the factory that was put in your car under warranty. It was manufactured EIGHT years after your car, long after the warranty finished.

It is very unlikely that the owner in 1973-74 took it back to a dealer and had them put a new motor in it that matched the spec of the original motor. The dollars involved to do that- especially during the gas crunch- would defy any logic.

1973 was 34 years ago. How do you honestly expect anybody to know what has happened to your car and the mystery motor during that time period.

You have a 1973 casting date block with an untraceable and non-decomposable CE number- beyond the simple sequence number. CE motors were a dime a dozen since they were offered throughout the 5-50 warranty program not just on Corvettes but pretty well on all platforms. Keep in mind that the 0010 casting number was used for 302, 327 as well as 350 cu. in. engines. How do you know yours isn't a 302?

Your comment "I can't believe none of you C3 guys can't figure this one out?" infers that there is some mysterious secret bank of data or decoder ring from a cereal box that is unique to C3s guys, and that we're either holding out on you or we're too dumb to use it.

I can assure you that neither is the case.

 

I checked the right head and it is a W with either a slanted 1 or maybe a slash / and then 53. Any way the cast could have had an upside down letter and should be an M vs W?

 

Go drive your car and don't worry about me any longer. I am not looking for negativity.

And to the rest of you THANKS !

 

Motor information is updated. See original post for casting numbers. It also has dome pistons and most likely 64cc chambers. We think 11:1 compression. Any clue what I have regarding HP?

 

Do you really believe that after dissing several people who tried to help you that anyone else is willing to help? You were given all the info available from a respected collective knowledge base. If it wasn't enough or wasn't what you wanted to hear, maybe you can find a crystal ball to tell you the rest.
Terry

 

350 hp in a '73 350 motor?

 

Terry,

That was a sarcastic remark and I was not DISSING anyone. Thanks soo much for your comments. The guys in the C2 forum had a lot more good information so I'll leave you guys alone.

 

The 73 is a short block. It was a replacement for a 327/365 SHP motor.
The heads are over the counter 2.02/1.60 64cc LT1. Pistons dome 11:1 compression, Cam is nasty like the 30-30, solid lifters, aluminum 327/365 intake with Holley carb, 2 1/2" rams horns. my guess is that it is a copy of the 327/365 original motor but a CE replacement short block. I was told the CE replacement motors were used extensively when owners lost a rod damaging their original SHP motors!

 

You were told wrong.

 

Maybe you should take your own advice.

http://forums.corvetteforum.com/show...8&postcount=24

 

Just for your benefit, it was the Chevrolet plant manager that told me the CE short blocks were a common replacement for the earlier blown motors. But I guess you know more than him! Maybe you would like to tell him he is wrong? Sure hope all the C3 guys here are not as negative as you toward other Corvette enthusiasts

 

Yep, it's guys like you that causes posts like this!

 

And consistent with most of your posts, you don't seem to understand what people are telling you. Maybe you don't want to understand, but that's not my problem. Tnovot nailed it quite well above and as usual you ignored his comment and went on the attack. I still suspect that you just want somebody to tell you that yes, your mystery motor is a 365 horse engine- as you've claimed at least once on the C2 forum.

I'm sure the plant manager told you that CE short blocks were a common replacement. That would be correct- for engines that let go while still under the factory warranty coverage period. That's what warranties are for and most intelligent people take commercial advantage of them. Why buy a new engine when GM will give you one for 'free'?

The above does not apply to you or your car. Your CE engine was built (at the earliest) 8 years after your car. That gives it zero chance that it's a warranty replacement for your original engine.

As the antithesis of getting a free engine while under warranty, why would anybody buy a new engine from GM (at retail price$$$$) for an 8 year old car NOT under warranty? 1973 was the peak of the gas shortage, if anything people were parking high HP and BB gas guzzling cars, not buying new SHP engines for them

The plant manager might have had visibility of how many engines got replaced under warranty, but he would have little chance of knowing (or have cared) how many engines got replaced after the warranty period expired on cars 8, 18, 28 or 38+ years old.

You have shown no proof that your engine was installed 'new' by a dealer as a direct replacement- or any similar clues of it's origin that might add credibility to someone guessing what it is.

As stated way up above the CE program was not unique to Corvettes, SHP or otherwise. All Chev and I believe all GM products were covered by the 5/50 program, meaning that your engine could have been built to replace anything from a low HP dump truck to a no HP grannies' weekend churchmobile.

You seem fixated on and unable to let go of a unlikely premise- the owner of the car in 1973 installing a new, exact replacement 365HP over the counter short block from GM, and that nobody has touched the configuration of the engine since.

What's the chances of that happening vs. the probability of somebody dragging an engine out of the junkyard 10-20-30 years ago and simply installing the reusable top end bits on it? For all anybody knows this could be the tenth engine in your car, how would you know the difference?

Try to be realistic- as hard as it might be.

 

Well said.