"First, a word about factory Pontiac heads in general: Pontiac heads were originally designed to get heavy cars up and moving. As such, they emphasize low-end torque over top-end power. Pontiac port volumes are roughly equivalent to a 350 Chevy small-block, yet most Pontiac engines are at least 50 ci larger. When it comes to porting the factory Pontiac heads, H-O Enterprises' Ken Crocie, a recognized Pontiac expert, says "You can't make a Pontiac head big enough. You can make it wrong, but not too big."
From Hot Rod magazine
https://www.hotrod.com/articles/hrdp...pontiac-heads/
.
__________________
'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 )
Old information here:
http://www.hotrod.com/articles/0712p...tiac-trans-am/
Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine)
5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension
https://www.youtube.com/watch?v=qDoJnIP3HgE