I have a basic DIY gen vi 454 upgrade going on in my garage right now. I have brodix 270 ovals, dual plane brodix manifold, holley 800, and imco exhaust with the "SA" riser custom welded(mixes water about 10" from center of riser / manifold joint . 9.2:1 CR. thunderbolt V.

Crane 731 vs XM284HR
the crane seems to be more popular, but i have some questions that apply to both cams.

will it revert with this exhaust?
can i use my stock pushrods?
can i use my stock lifters?

are comp cams 17021 roller rockers any good?


Thanks in advance,
Todd V.

I'm looking at that Comp cam in my Merc 420 upgraded rebuilds.