a few years ago trickflow heads were cutting edge... now theres many better options,
,using those heads would depend on the goals you set, and price you could get them for,
and condition,they are in, obviously
http://garage.grumpysperformance.com/index.php?threads/a-brief-look-at-clutches.447/
http://garage.grumpysperformance.co...xperienced-and-skilled-help.16177/#post-97651
standard diaphragm replacement clutch (most are inferior in my experience, as most are designed for daily drivers cars not full power shifts)
borg and beck style (these tend to result in noticeably more clutch petal effort but if correctly assembled they tend to last longer and work noticeably better)
keep in mind I almost never built any engine SBC or BBC , to install in any manual transmission performance car like a corvette or camaro or nova that did not have impressive torque,
450-600 ft lbs
and I expected the cars or owners to use those engines like a performance muscle car or corvette is frequently driven,
which means the cars occasionally shifted at 6500 rpm under full power.
many diaphragm clutch pressure plates don,t like that, much
a diaphragm clutch works ok at lower rpms and makes for a marginally lower clutch petal effort, so they are popular with the daily driver crowd, but seldom serious performance applications.
granted things may have changed, in the last 5-6 years,but I never found a
HAYS,
ZOOM,
centerforce,
ACdelco
DIAPHRAGM clutch design that worked as well as the borg & beck pressure plates in a racing application.