[blykins]

FE parts are big. Heavy .875" lifters, heavy valves with thick valve stems, fat heads, and long overall lengths, etc, etc.

There are lots of differences between the FE, the typical SBF, and the LS line of engines. These are not 7mm stems and .842" lifters...they are 2.250" valves with 11/32 or 3/8 stems and a longer length.

I've tried many combinations of parts on hydraulic roller FE's, with the exception of titanium valves. Paying $3-4k just for a set of valves is ludicrous for a street engine. I've tried Ferrea hollow stems, extreme spring pressures, titanium retainers, etc.

It's more of a challenge than just the normal combination of parts and usually 6000-6100 is all she wrote....and that includes using beehives, titanium retainers, hollow stem valves, etc, etc.