Dedicated to the Promotion and Preservation of American Muscle Cars, Dealer built Supercars and COPO cars. |
|
|||||||
| Register | Album Gallery | Thread Gallery | FAQ | Members List | Calendar | Become a Paid Member | Search | Today's Posts | Mark Forums Read |
|
|
|
Thread Tools | Display Modes |
|
|
|
#1
10-12-2024, 02:52 AM
|
|||
|
|||
They all came closed chamber from GM. I have had many sets that we opened up to the open chamber design.
Those also had the extra(ZL1) head bolt boss added to the underside. The later service heads had no plugs on either end. Jason Last edited by SuperNovaSS; 10-12-2024 at 02:54 AM. 
|
| The Following User Says Thank You to SuperNovaSS For This Useful Post: | ||
Jimlt4383 (10-15-2024) | ||
|
#2
10-12-2024, 11:30 AM
|
|||
|
|||
|
Thanks Jason. That was what I assumed but wasn't 100% sure. Are the stories true about the seats coming loose on some of these early factory aluminum heads. I've had a few sets pass through my hands but didn't have the nuts to roll the dice and use a set for fear of ruining an engine.
__________________
70 Chevelle Vert L34 M21 28-A 791 70 Chevelle Cpe LS6 M40 14-14 756 70 Chevelle Cpe L?? M?? 926-99616 755 69 Chevelle Cpe L78 M21 71-B 756 70 Chevelle Cpe L34 M20 48-48 796
|
| The Following User Says Thank You to BLACKLS5 For This Useful Post: | ||
Jimlt4383 (10-15-2024) | ||
|
| Thread Tools | |
| Display Modes | |
|
|
Hybrid Mode
