09-07-2010, 08:39 PM
Trey, the 1st one is for an external clip, the second one is for an internal. most caps have the grove for a internal...however if there is a grove on the outside of the housing(H block) then i would use that...ill go see what mine are and report back.
77 built 306,Trickflow Cam/Alum Heads/dome pistons/10:1comp,nv3550,duff long arms,3.5" lift,family cage,protofab rear bumper,twin sticked, and 35KM2'sG.D.I.