Hello. I am building a 1970 Plymouth Belvedere 2 door post. Originally a 318, bench seat, auto with heat and am radio. I have added a MRL Performance 360 with 550+ hp and 525 tq, 518 4 speed with b&m shifter, frame connectors, Flaming River Col., 8 3/4 sure grip with 3.93 gears, bucket racing...