Imo Apita

Managed to be at the right place at the right time and scored a free engine.
Block: 3970010
Head: 782461

According to www.mortec.com the engine block comes back as:
3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4

Engine is still at the shop so can't double check the head #'s right now but mortec lists a 3782461
as a 3782461....64-66...327......Camel hump,no accessory holes,160/62cc port volumes,62cc chamber
But I'm pretty sure it doesn't start with a 3.

Google search came up with:
http://www.hotrodders.com/forum/cyli...elp-17752.html

Engine comes out of a '66 Corvette but pretty sure it's not the original engine.
Anybody care to chime in as to what I have here?
A 350 or a 327?

My daily driver is a '79 with a cam going bad so is it worth to do a rebuild on my mystery motor and replace my ailing 350?

Imo Apita

bump tsjiekie bump tsjiekie bump..........

DZRick

Any numbers stamped on the pad in front of the passenger side head? That would tell you exactly what it was.

The block casting date located on the back left above the bellhousing will narrow things down if the pad is empty.

I had a 69 Z/28 302 and while there were 2 possible casting numbers if I remember correctly 3970010 wasn't one of them.

The heads should also have casting dates.

wer2xu

what color is the block?

Imo Apita

The block is orange.

I'll need to clean out my shed today so I can make a little workshop and get the engine in coming week.
I'll see if I can get some additional numbers in the next couple of days.

Would it be worth the trouble and expense rebuilding it if it turns out to be a 302 or 327?
If it's a 350 I'd like to get the 383 stroker kit.

Imo Apita

Some more numbers here:

Right Head GM7 E135/
Left Head GM8 E148/

Other head #s 782461

Passenger side block behind the RH : F242 or E242 hard to read.
Rear of the block just above the crank H8 below the freeze plug on the right hand side 010

Any suggestions?

RedAirRdstr

If you scored a 302 for free, your next stop should be the casino! The 302's, at least the 69's have a DZ code on the front pad, but a good 350 or 327 for free insn't bad either

d555

E 24 2 3970010 is a 72, 350 block. Were either 2 or 4 bolt main, large journal. Look at the engine suffix code at the front of the block. Should end with 3 letters that will tell you what it came out of. Heads are 65 327 heads, no bolt holes on end. camel humps.

Imo Apita

Thanks a lot for your help so far guys.
According to Mortec the heads should be 62cc, what compression ratio are we looking at here if it's a '72 350...a little over 10-1?
Apart from the fact that it came from a running '66 I know diddly about this engine.
I'll need to check again for the block numbers at the front.

Mad Vette

That 3970010 was a number assigned to a wide array of engines 327 & 350's from 66 to 73 2 or 4 bolt main. If you and the stamp pad numbers that would really help. My 71 270 hp 350 has the same number. And yes it could also be a 302, for free that would be a score. What is the history of where it came from? Do you know?

DZRick

I stand corrected, there were 4 block casting numbers that were used on the 302.
The 386, 618, or 010, and the 388. The block casting date will tell you if it could have been and on some 302 engines the vin was stamped down by the oil filter. It was not a machined pad and can be very had to see.

I see that the block was cast in 72 so there is no chance that it's a 302.

xCCTer

Couple other good sources.

http://willcoxcorvette.com/advanced_...php?cPath=1995

http://www.nastyz28.com/chevy-engine-code-stampings.php

xCCTer

Like this.

vettebuyer6369

Yeah, you will eliminate a lot of this guessing stuff if you get the info off the pad. The VIN derivative is on the left, the assembly date is on the right. Get that with the full prefix & suffix. Also the shape of the pad matters... is it like the picture above or smaller and "more square.'' Also, is the casting number format using one or 2 digits for the date? ("2" vs "72.")

010 motors ran for about 10 year in Corvette starting in late '69, in 4 bolt, but they were used in a lot of cars. Those heads might not tell you anything as they could be off another car, too.

Imo Apita

Got around to getting the numbers:
12S525598 on the left side of the pad and VO628CKX on the right side of the pad.
I'm assuming that the O in the second number is the letter O and not the number zero. The corners of the O are kind of squared off.
From:
http://www.nastyz28.com/gm-chevy-cod...s-suffix-2.php


So is it a June 28 1972 from Flint?
Still struggling what car this engine was originally in.

sundevil74

Another casting number for a 302 is 3914678 for a '68. I have one I'm trying to sell.

Mike Ward

Given the casting date, VIN derivative and engine suffix, it's from a very late build '72 Corvette. 200 HP 4 speed.

Nice find.

DZRick

I sorta had tunnel vision I hear 302 I instantly think of my old 69 DZ.

I imagine that 68 302 should bring some good money, have you posted it for sale on this site?


http://www.camaros.net/

Imo Apita

Thanks Mike, but how did you get this info?
200HP?
So far the heads have come back as '65 62 cc camel humps.
Compression should be what...10-1?
A rebuild of this combo should be more then 200 HP right?

Mike Ward

The engine machine code suffix narrows it down to three possible choices. The VIN derivative defines it as coming from a Corvette. The casting date just confirms the other points.

200 HP was the base engine in '72.