Thread: L78 horsepower
View Single Post
  #19  
Old 10-14-2017, 02:08 PM
bergy's Avatar
bergy bergy is offline
Yenko Contributing Member
  
Join Date: Feb 2005
Location: Pennsylvania, Florida
Posts: 2,868
Thanks: 1,026
Thanked 1,636 Times in 434 Posts
Default
every 427/425 that I have had done developed between 490 and 505 hp through headers with stock carb & dist.
Reply With Quote