Thread: 400 vs 428 - Help Me Decide
View Single Post
  #16  
Old 09-18-2021, 01:05 PM
padgett's Avatar
padgett padgett is offline
Senior Chief
  
Join Date: May 2021
Posts: 467
Default
Just a thought: 6X have all the exhaust manifold bolt holes and hardened seats. Unless replaced a 670 has soft seats.

__________________
Orlando - Where rust must be imported.
Web Site


Reply With QuoteReply With Quote