Used +.050 locks and .050 keepers to achieve a 2" installed height. Sourced correct (longer) studs for rocker shafts Deburred castings Corrected rocker geometry by moving shaft .090 up and .090 away from the valves Grind for pushrod clearance
I don't see anything different going on with the set of -1s that we have either.
With a standard +.100 BBC valve the installed height is not anywhere close to 2". In fact I will most likely use the same Ti locks/retainers and Isky (PSI) RAD springs that we have on the victors. As far as geometry if i were installing longer valves (+.200 BBC valve i.e.) to gain installed height the jesel rocker bar would have to (gasp) move up and back to create an acceptable sweep pattern. Sounds like these two heads have parity if you are trying to run a common 2" valve spring. And yes it seems like heads that have large ish ports will want a +.700 lift roller cam to make power per thier design. I crigne when I see people using flat tappet stuff at that level. When the list of compromises gets long it see,s like the hp and rpm fall off. It all depends on your desired service intervals and intended use.
