Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 33 chevy ongoing project
View Single Post
  #2 (permalink)  
Old 11-23-2011, 11:31 AM
cobalt327's Avatar
cobalt327 cobalt327 is offline
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Posts: 5,031
Wiki Edits: 1616

Thanks: 128
Thanked 616 Times in 565 Posts
Use the Vortec heads. They flow as well if not better than the LT1 head and don't require welding, etc. that the LT head does to make it work on a non-reverse cooled block.

The Vortec will not allow for more than about 0.460" of lift w/o clearance between the seal and retainer being too close and the springs themselves are too weak for most aftermarket cams so they have to be changed.

There are spring packages that can be used to get around having to machine the guide boss for clearance or you can have the boss shortened and cut for seals if you prefer.

There are a lot of threads here and elsewhere on this, CLICK for some more info on Vortec heads and mods to them, etc.
Reply With Quote