Matt, FWIW your McLeod throwout mechanism looks very similar to the Tilton assembly I've been using since 1992. Tilton supplied these with threaded aluminum front bearing retainers only for T-10s, Muncies and Jericho trannys for dirt track racing, so I built a billet ZF retainer and got the system to work with a 351-C. My problem was exactly opposite: with a stock clutch, flywheel & bellhousing, I had almost no 'spare' room between the outer end of the Tilton and the ZF bearing retainer, when things were adjusted per specs. Are you running a stock Ford motor-protection plate between the block & ZF? That plate introduces 0.190" more length to the system. If you felt confident the clutch would NEVER blow, you could dispense with the plate & suck the ZF & throwout in that much closer. Or just have someone make you a longer threaded front retainer.
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