Is there a way to check the stroke of a motor with the pistons and everything installed? I just bought a 350 and ran some parts numbers and I am not satisfied with what I found! It seems that there is potental that it could be a 327. The block number is 3970010, which was used in 69 but was used for 3 different types of engines, the 302/327/350. Also another number I check was the number on the passenger side front pad underneath the head. it reads V0425TMM which means it was built in the flint engine factory on April 25th. no idea what the T or MM stands for. According to the CRG web page the MM was used in 67 camaros with the 327 w/ auto tranny. But the car was a 68. I also used mortec.com for codes but all I could really find was the block castings...Now I know I should look at the heads casting numbers to know for sure, but those are being rebuilt so I wont see them for a week.


Are there any other markings that will I dentify that this is a 350?


Last note is that this is one of those 010/020 blocks. Which, accordin to mortec, is a desirible block cause of the additional 1% tin and 2% nickel added to the block.

 

Use a 6" ruler and measure how far down the piston is in the hole when at TDC, then measure again with piston at BDC.

 

Or you could pull the oil pan off and look at the casting number on the crank.

 

IT'S A 350!! Thank you ZZ28ZZ for that tip... I wen out and used a tape measure and just brought it down to BDC and measured it. It was 3 1/2 inches, and I figured it would be about an 1/16-1/8 from the top of the block. Then checked it with mortec.com stroke size chart and it is indeed a 350 stroke! I happy once again...I was scared there for a little bit. thanks again...Oh and I kinda didnt want to drop the pan to check it out cause then I would have to buy a new pan gasket 50 bux for a new one, no thanks! but effective non the less.

didnt even think it to be this easy

 

well its one of these block from the engine suffix code:

1974 TMM 350 conv.cab 145 2 C-10 & 1500
1980 TMM 350 conv. cab, a/t, Cal M LT9 170 4 C-20 to 3500

and one of these blocks from the casting code:

3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4

 

the 145 and 170 that are in bold please tell me that isnt horse power Can u go into more detail of what all that means

 

74 Turbo 350 (about 99% of all 350/auto combos were a 350 trans); conventional cab; 145 HP 2-barrel carb; C-10 and 1500 are Chevy & GMC models of ½ ton pickup trucks 1980, same trans, same cab, California model, 170 HP 4-barrel, ¾ ton pickups

Pretty typical mid 70s 350s. Lame. The only difference between the 2 possibilities is bolt-on stuff that should all go in the garbage; heads, cam, pistons, are all the same, so it doesn't matter which one it is. But, it's a 350 nonetheless. Throw away all the parts that are responsible for lameness, which would be pretty much everything except the block, crank and rods; put some flat-top pistons and some decent heads and a decent cam and intake and exhaust on it, it can run pretty good. If it only had some compression, it could run strong, if it only had some flow. "If we had some ham we could have ham and eggs, if we had some eggs".

 

i have one of those blocks, good block, just get new or used heads that actually flow a little and would make for some respectable compression, get a decent cam and some flat tops and ur in business, also since yours is a truck block its pretty likely that its a 4 bolt block

 

Well I think for the hell of it I'm goin to pull the pan...Just to know if its four bolt...Also I thought that I have flat top pistons? If those are not flat tops then what are they?

 

Being a truck block, the block is almost certainly is fitted with 4-bolt main caps.

The pistons are dished; deep, anti-performance, smog dished.

Like I said, you have a block, crank and rods that are a good foundation for a build-up; the rest is trash.