Gen III Hemi with 4-speed?

sorry guys new at this site but buschi340 was drilling the flywheel hard to do? was there any balance problem ? and what you guys do about the bushing at the end of the crank ?
but the biggest question is how are these cars after the swap from a 340 or 360 to a 5.7 or 6.1 how's the power and drivable ?