545rfe ?s

Sounds kind of like he wants to use an A500 transmission with a GenIII Hemi....maybe? If so, his best bet is to get the Mopar Performance flex plate and spacer. Unless someone has come up with a different solution to use a 904/500 or 727/518 with a Gen III motor, that was it when I started looking 3 or 4 years ago. It's a flex plate made to fit the crank and accommodate the old converters. You also have to use the supplied spacer between the motor and bell housing or it will bust the pump in the transmission when you tighten the bell housing bolts. I'm going to stick with the 545RFE because the sawzall has already spoken.....lol.