Originally Posted by CHEVY 64
hello to all i just got me a 66 chevy convertible and wanted to check the info on the motor,i have looked up a few sites but cant seem to figure out what it is for sure the back of the block number is 3970010 its telling me its a 68-79 327 or 350? wanted to know for sure wich 1 it is and te front numbers are v0510tru does this tell me is it out of a truck??? any help would be greatfull thanks much
" indicates the Flint assembly plant, "0510
" are day/month date codes. The suffix code is TRU
. Using the suffix code along w/the casting number (3970010
) and the casting date code
(unknown at this point) will narrow it down quite a bit. The date code is back by the bellhousing flange, adjacent to or opposite of the casting number in most cases.
Many data bases do not include all the truck suffix codes, so it's not at all uncommon for one to not show up. Just be sure the suffix is actually what you think it is, they can be hard to read sometimes.
The large journal 327 was only used briefly, the vast majority of c/n "010" blocks are 350ci from the factory, although you can put different stroke cranks in them- the factory used 3", 3.25" and 3.48" stroke cranks and the aftermarket has supplied many others, including the popular 3.75" "SBC 383 stroker" crank.
As far as for buying parts, etc., the important things to know are the block has a 4" nominal bore diameter, it has a 2-piece rear main seal, a 2.45" main journal diameter, the dip stick is on the driver side of the block. The 010 block was never used w/a factory roller cam. It may be a 2- or 4-bolt bottom end, 4-bolts are commonly found in trucks/vans/buses as well as some high performance passenger car applications.
See ID Chevy engines
for more info.