I have a 1965 Impala ss 327 with powerglide. I am having trouble making sence of the engine casting numbers and stamped number.
What I have so far:
Cast number (back driver's side) 3782870= 1962-1967 327
Cast date (back passenger's side) D308= April 30 1968?
Stamp (front passenger's side) F0503S= flint May 3rd (not sure on the "S")
Heads 3782461= 1962-1967
What has me confused is the "s". I found that suffix S is for 1962 passenger 327's. And that block castings seem to contradict themselves 1962 to 1967 on one side, then 1968 on the other.
Pretty sure I am reading something wrong here. Any help would be greatly appreciated.
A 327 PowerGlide with a four barrel would have an HC in the application code stamped on the ledge just below the passenger side head. The other codes used on a 327 in 1965 were HA, HB, and HD. The HB and HD were found on 300 horsepower 327 and the HA on a 327 250 horse manual four barrel motor.
The application code on the front of the motor tells you what it was installed in and with what tranny across all years (they are all fairly unique by decade).