Sprint ohc 6

[claudio]

What is the diffrence between the ohc 6 in 1967....and the
Ohc 6 in 1968/69....?
3.8. Vs. 4.1...? ...same block....?
Thank you for help

 

[melsg5]

they increased the stroke, here is a pretty good history.

http://ateupwithmotor.com/model-histories/pontiac-ohc-six-history/3/