On my Buick 455, stock'ish Center Force would slip in higher gears at WOT. The McLeod pressure plate at 20,000 miles seized up while I was driving to Drag Week causing me to miss Drag Week (and almost rear end a car in front of me when the clutch wouldn't disengage). Put a Zoom in and it has good feel and no apparent slip at WOT, so my preference �� Its got one Drag Week on it and 12 years. I spin it to 6,200rpm.
Put the other scatter shield on without the block plate. I've clearanced this one already for some reason (I think to clear a gear reduction nose cone...,) and still wouldn't be enough for a mini starter.
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"How I learned to stop worrying and love the OHC Pontiac L6"
The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!)
1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!)