[DanEC]

I'm no expert on these things but you might post a close up of the holes drilled in the crank in the last photo so someone can tell if any of them have Mallory in them. Safest bet is still to talk to the machine shop or builder directly.

Keith Craft suggested a 18 lb aluminum flywheel and standard 12 inch clutch , all from McLeod for my car and I love the way it revs. I noticed the other day that the 11 inch clutch is rated a slightly higher clamping pressure than the 12 inch - probably to make up for the lesser friction contact area. So both (11 and 12 inch) probably have about the same capacity. Possibly the slightly lower clamping pressure of the 12 inch might relate to a slightly softer clutch pedal effort - but if so, not by a lot.

Blykins might be able to recognize some of the parts on the engine and give you a ball park est on HP. I know from my visits to Keith Craft that most of his blueprinted completely stock CJ motors made about 415 HP. But from the above I don't know what steel heads and intake you have, what compression pistons and you have an aftermarket cam. Getting some part numbers off the heads, looking up the cam and piston specs and an ID of the intake might help some. A lot of variables including the skill of the assembly guy and getting it dialed in once it's running.