looking for Abody 4 speed parts.

The original 10.5" small block bellhousing cast #3743859 to fit 1975-6 A-body/1975-80 F-body/1976-80 truck 318/360 A-833 overdrive applications, 5.125" bearing retainer opening, uses 130 tooth flywheel. You will also need the frame side torque shaft ballstud reinforcement bracket (welds to frame rail on all 1967-76 A-body cars) and the overdrive bellhousing fork pivot. If I remember correctly you can use 67-74 pedal assy, call Brewers Performance to be sure. Of course 73 or 74 would be correct and best. The rest is just 73 Duster stuff. Check the crank as posted above, it can be fixed easily now, either way you go.