Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 400 sb 509 block
View Single Post
  #1 (permalink)  
Old 06-29-2012, 06:33 PM
maj1 maj1 is offline
Registered User
Last photo:
Join Date: Jun 2012
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
400 sb 509 block

I have a 509 block with block number 3951509. How do I tell if it is a 2bt or 4bt seeing how they were both made under that number. It has 4 bolts but it has had alot of machine work. not sure if cap are aftermarked or not. Outter bolt are bolted at an angle. I have seen splayed cap but am not sure if they are an older style.
Reply With Quote