Thread: What did I get?
View Single Post
  #5  
Old 09-15-2016, 06:57 PM
77 Canamman's Avatar
77 Canamman 77 Canamman is offline
Ultimate Warrior
 
Join Date: Aug 2006
Location: PA
Posts: 4,022
Thumbs down

Quote:
Originally Posted by rexs73gto View Post
The 557 block is something you should just throw away..................................... I wouldn't use that block unless you were doing a 76-77 numbers resto & it would need to be a very low powered engine & you don't run it hard EVER.

MYTH.. They are good to 350 HP. I have run every '77 W72 engine I owned to redline several times and never blew any of them up. 12 and counting..

They are not good for stroker conversions or high HP builds. For mild to moderate running, they are fine.

__________________
1976 LeMans B09 Freeway Enforcer, 455/M40 Smokey

1977 Trans Am, 400/M21 Black/Gold Bandit. 44K actual miles

2017 Sierra SLT 1500 Z71 4X4

2019 Canyon SLT Crew 4X4