Mechainiac
No 2 holes line up but the flywheel/flexplate 6 bolt has a recess in it for the end of crank 3" circle and the crank shaft 4 bolt has the a lip on the 4 bolts holes so flexplate would not fit flat
looks like the 248 crank takes manual shift only.
Ever hat a 53 hydramatic apart? Did the military have hydramatic in the 40s and early 50s? Bill