#21  
Old 08-24-2019, 12:12 AM
Jack Gifford's Avatar
Jack Gifford Jack Gifford is offline
formerly 'Pontiac Jack'
 
Join Date: Dec 2004
Location: Phelps, NY 14532
Posts: 10,176
Default

I forgot to mention one other item-
> 7/16" screw-in studs rather than pinning 3/8" studs, to eliminate stud flex. I also adapted SBC roller rocker arms.

__________________
Anybody else on this planet campaign a M/T hemi Pontiac for eleven seasons?
... or has built a record breaking DOHC hemi four cylinder Pontiac?
... or has driven a couple laps of Nuerburgring with Tri-Power Pontiac power?(back in 1967)
  #22  
Old 08-24-2019, 01:47 AM
Rocky 389's Avatar
Rocky 389 Rocky 389 is offline
Senior Chief
 
Join Date: Feb 2004
Location: Bellevue, Nebraska
Posts: 310
Default

Mike, I'm running a pair of 73-74 GTO heads on the early block. They have chevy 7/16ths rocker studs, push rod guide plates and hardened seats--all from the factory. Pistons are Jahns with a "lump" on top to compensate for the big ol 90 sumthun CC heads. Seems to run strong and cool.

__________________
Roll around in the excitement
  #23  
Old 04-21-2022, 09:53 PM
694.1 694.1 is offline
Ultimate Warrior
 
Join Date: Jul 2010
Location: SE WI
Posts: 1,366
Default

Here is a good tread from Jack:
https://forums.maxperformanceinc.com...d.php?t=783279

__________________
"At no time did we exceed 175 mph.”
Dan Gurney's truthful response to his and Brock Yate's winning of the first ever Cannonball Baker Sea-to-Shining Sea...

Still have my 1st Firebird
7th Firebird
57 Starchief
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 12:47 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Copyright © 2017