well I had Dick Hall assemble my 468.
after 6 weeks, I get the motor back and after about 20 minutes of run time it starts to pop. I pull the intake off and see that he did not check lifter to lifter bore clearance and the lifters hit the block, broke the cross bar off and turned sideways, destroying a brand new set of comp roller lifters and a brand new Lunati roller cam.
As I am taking the motor out i find 2 head bolts are not torqued down, only finger tight.
I pull the motor out, put a new cam and lifters in it and head to the track, Now 3 weekends and 22 passes later it has 4 pounds of oil pressure.
I pull the pan off and ALL 5 main bearings are destroyed, 2 are through the copper. The crankshaft is a total loss.
My advice is to stay away from him or his engines, He is a very nice man but my experience has been terrible.