Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - heads
Thread: heads
View Single Post
  #3 (permalink)  
Old 10-11-2012, 07:27 PM
BOBCRMAN@aol.com's Avatar
BOBCRMAN@aol.com BOBCRMAN@aol.com is offline
Member
  
Last photo:
Join Date: May 2002
Location: Holly, michigan
Posts: 7,244
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 84 Posts
624 castings are in general, the worst heads that GM made. Average flow, but VERY crack prone. Later hd versions have a diamond shape cast on the outer side. They are less prone to cracking..
Reply With Quote