Hi, I have s 350 buick engine that was recently rebuilt and I'm trying to figure out from which car it originally came from. Casting number seems to read 8H319536. Builder told me it had matching numbers transmission which is a TH375 that has a tag that reads BU 68 74579. All I could find on the internet is that TH375 were in the 70s only so how come the tag says 68? And I checked buick engine casting decoders and nothing matches ...
Maybe it was a TH400 that was used in a '68 buick and someone swapped the tail shaft and guts for TH375?
That's not the casting number, it's the partial VIN from a Flint built car. 1978 block should be GM blue, so this is a 1968 engine. That's at the bell housing, on top of the engine. VIN production sequence numbers (last 6 digits): 1967-1970: -starting at 900,001 for Riviera (all Riviera chassis built at Flint, MI and bodies built at Euclid, OH) -starting at 600,001 for A-body cars with V6 (1967) and L6 (1968-1970) engines at each plant -starting at 100,001 for cars with V8 engines at each plant -engines same as last 8 of car serial number for 1969 and later except that the number 4, indicating Buick, maybe at the beginning of the engine serial number
ok so just got this number 1382201 off the top of the block. According to this site "V8 Buick 350 Casting Numbers (teambuick.com)" it would be a 70-? block
And on this website they say that casting number 1382201 is for a 1970 455 engine: Click image to visit website
Check for the two letter engine code on the block, here are the 350 codes from the "ULTIMATE AMERICAN V-8 ENGINE DATA BOOK 1949-1974"
I'd expect to find a "PP" code for 1968, 280hp but I don't know exactely where on the block it would be.
Some of the charts shown are from a book "Buick Used Parts Buyers Guide". From the Salvage Yard Buyers Guide Series. Not saying it is not correct.but I do not use it. Buick states: The cast 1382201 is a 350. 1968, 1969, 1970 & 1971. Transmission "BU" is a ST400 used with 350 engines. This could help instead of guessing. Shop (gsbythenumbers.com)
Yep, but we already know that it's a 350, you can't really miss that big 350 in his photo The thread starter now wants to know the year of the engine. And that's where the 2 letter code comes in handy.
