Fitment-

• 351C heads
  

These guide plates are intended for use on either OEM heads which have been converted to accept screw in studs and guide plates or aftermarket heads which come fully machined for studs and guide plates from the factory.

Either way, heads which accept guide plates will have 7/16" NC threads and not small 5/16" NC threads like OEM factory pedestal mount heads.

Note: If your iron heads have factory pedestal mount type rockers which bolt down with a 5/16" bolt, they'll need to be machined to accept this type og pushrod guide plates.

         Specs: