Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Locking Mech and vac advance on HEI issues
View Single Post
  #3 (permalink)  
Old 04-26-2010, 11:20 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
Excessive end play on the distributor shaft will cause at least some of it. You want to set the play to ~ 0.017"-0.020". I've seen them over 0.100".

Mr Gasket and others have shims for the HEI. The shaft is ~0.490" OD.

What you're probably seeing is a combination of the timing set, distributor end play AND the cam being forced rearward.
Reply With Quote