Why a second clutch Tim?
I put a McLeod RST twin and a hydraulic cylinder with custom made mount into my 730hp big block a few years ago and it wasn't as great as I was led to believe it was? This current M22 sbc install that just went into my 68 is the first Hayes clutch I have done in a while and I am glad I went back to a mechanical setup. It's working great behind this little 500hp small block. Had it out banging some gears last night in fact.