Are there different size flywheels?
Like a 153 0r 168 tooth?
If so,get the smaller diameter flywheel a 10.5 inch clutch will work fine, really do not need an 11"
My friend ran a 10.5" in his 509 BBC that made 600HP & a lot of torque.
You just need a stiffer/stronger pressure plate.
I would not get a reconditioned set-up, who knows if it can be balanced? I got a reconditioned set-up once & had to exchange it three times before my friend @ the "balance shop" could balance it.
I thought I remember the "Borg & Beck" pressure plates are harder to press your clutch pedal over a "diaphragm" type?
My two cents.
MBHD