I was told from a well know cylinder head guy that I need either Trickflow guide plates or Adjustable Guide Plated for the Lt1 and Lt4 Heads. I seen the trickflow plates have different pushrod slots, they are spread apart more. Anyone know anything about this?

 

TFS-30400624-8

that is the correct part number for the guideplates designed for the lt1

or... you could use the isky adjustables

 

The TrickFlow guideplates work real well on my LT1 heads.

 

that goes for the lt4 castings too correct?

 

Gm makes guideplates for the lt1 heads. I run them with out a problem. My rockers are centered. They had problems a few years ago with some not being hardened but was cleared up in no time. Food for thought.