...got a V8 from a 69 Chev pickup, the numbers on the Morteck chart says it's a 302, 327 or 350,....how can I tell what it really is without tearing it apart? I'm sure it's either a 327 or 350 as 302's weren't put in 69 pickups. Thanks.
What are the numbers? On the back of the block? On the front left? (These will give an indication of vehicle) What are the numbers on the Heads? At worst drop the pan and get the number off the crank, This will nail it for ya.
Kinda weird but without being too extreme. If you had no external stamps to go on: Could you put #1 to TDC and mark where a pushrod inserted through the sparkplug hole meets the threads, rotate the crank 180 mark the rod again. The distance between the two marks (stroke) would tell the tale.
The numbers likely just ID it as a large journal small block with a four inch bore. You need to see what crank is in there to know what ya got. The 350 has a 3.48" stroke, the 327 has a 3.25" stroke, and the 302 has a 3.00" stroke, all with a four inch bore. You can swap cranks and pistons to change the same block to either a 302, 327 or 350 using factory components. GM used the same blocks sometimes for different displacements, so get the numbers off the crank to know for sure. Sometimes getting the cylinder head numbers can help you out, too...but not always...as many casting numbers were used on different engines. Odds are it's a 327 or a 350...most likely a 350 in 69. A 302 would have solid lifters and an aluminum high rise dual plane intake...and unless it was some one-off special order or dealer-installed deal...wouldn't have come in a 69 pickup, as you stated!
There is a pad on the front of the block at the base of the head. There will be a series of numbers and letters. The 2 or 3 series letters at the end of the numbers tell you what year, size of engine and even what vehicle the engine came out of. Check the letters in a Hollander manual or I ***ume there is probably a website that will decode the letters. A couple of examples are Q and QB for standard and High Performance 409s and DZ for 69 Z-28 302
The code on the Engine ID Number/VIN code is a big indicator of what the engine is ... if it is original and never messed with ... This is what Larry T is talking about ... Post those letters and someone can look them up ... .
...the numbers on the rear of the block are 3970010. ...numbers on pad on block in front of head are 115182021 and then V0318CG0. Thanks for your help.
My listing does not have a CGO ... the closest LOOKING code is a CGC ... and it's a 350 from 1971 ... see what the year casting date is ...
I don't see a CGO code either. Here's a site that will help you find out what you have. http://www.nastyz28.com/spmenu.html
69 was the last year for 327's. trucks and full size cars and chevelles, don't think any camaros or novas had 'em though
No 327 engines in 1969. 3970010 is casting number for a 4 inch bore 4 bolt main block. It should be a 350. Bob
The 3970010 block can actually be either a four bolt mains or a two bolt mains block, depending upon it's original application. Most people ***ume them to all be four bolts, but that isn't always so. It's probably the most common 350 casting number out there, at one time, they were EVERYWHERE. I've had a few myself, two of them were two bolt mains, one was a four bolt. You gotta drop the pan to know for sure. Changing the crank and pistons is all that's needed to go from 327 to 350 and vice-versa...these blocks were used for both engines, but the vast majority of them were 350s from the factory.
Its a 1971 350 of some sort. CG* codes on a 010 block were only used in 71'. Its most likely CGC and will be for a 71' 350 with a 2brl and auto trans rated at 245hp.
The Jalopy Journal
