Mini-starter compatibility

Does any body have the physical size, dimension, of the smaller mini starter? I have 340 Repro manifolds and 2 1/2 TTI exhaust and drivers side exhaust pipe hits the starter. My starter from mounting face to end is 6". A smaller starter would work. TTI is closed till Jan. 2 so can't contact them. Car is 74 Duster with 318 and 727.