Number9
Hero Member
Yep. I am no expert but if you are talking GTO"s Pontiac intro the 400 cdi in 68 and replaced the 389. Anyway one of the only mass produced Pontiac cars worth talking about.
The first year a 400 was used in a GTO was 1967 and only 4-barrel.. no tri-power.
I had a '66 with 389 and tri-power.. blew the 389.. replaced with 421 with the 3-2's.