The Jalopy Journal
Discussion in 'The Hokey Ass Message Board' started by Death by Pontiac, May 25, 2020.
cant seem to find any stamps. any suggestions?
Early blocks are in this spot.
Later blocks are here.
Wallace Racing has all kind of neat Pontiac info.
Make sure and post pics of your project. Welcome to the HAMB.
G 21 4 pretty sure Pontiac and Chevy used the same date code system, so that would be July 21, 1964 casting date. At least the year is right.
Advice from me is not always as reliable as advice from a priest but I am gonna throw this out there anyway. If it were mine I may be inclined to snag myself a set of dies and out any numbers and letters and symbols in it that made me happy.
The numbers are there, they are just where flamedabone said.
Just need to go down 4 or 5 more inches.
Some good reference material I came across a while ago,....all Pontiac blocks have a hydraulic lifter valley pan. That simply means that the intake is not sealed to the lifter valley, allowing you to remove the intake while the engine remains sealed. The distributor is located at the rear of the motor and can remain installed when the intake is removed. This is where you will find your first clue of the engine’s age. Appears road draft tubes were phased out in 1960 and replaced by PCV system...
If the valley pan has the PCV port at the rear, the block is from 1966 or older, and
If the PCV port is at the front, it is 1967 and newer. Of course, the valley can be easily changed or missing, so you’ll need to pry further.
Pontiac blocks have different freeze-plug configurations:-
1955–66 blocks have 2 (two) freeze plugs; and
1967–78 blocks have 3 (three) freeze plugs.
https://books.google.com.au/books?i...QAQ#v=onepage&q=1957 pontiac camshaft&f=false
Separate names with a comma.