We are using the QuickTime RM-947 plate. It needs to have the TC holes drilled into it. I was thinking of using the stock 8 speed plate, but it would need the hemi crank bolt pattern holes welded closed then drill the 6 bolt crank holes. Last step would be balance checked.. A lot of work for the stock 8 speed plate; might be same price to just use the 947. Supposedly, no spacer is needed between crank and plate. Also need the 8 speed stock crank bushing to center the 8 speed convertor.. Mopar Replacement 4736283AA Mopar Replacement Crankshaft Pilot Sleeves | Summit Racing