Need advice on used engine

Working on my second POT

I have one converter that was for the early trans. 8 inch TCI, that was rebuilt by PTC,with the large splines for the late trans.
Two 9 1/2 inch converters by EDGE with the small pilot, large splines.
I can use these converters with an early engine, as is.
Late engine with an inexpensive crank adapter.
Late trans, as is.
Early trans, with a input shaft/pump change to late parts.
Any combination of the above.

My 66 Cuda has the 8 inch converter, early 170 engine, 65 trans, 64 Manual Valve body and pushbutton shifter, V-8 998 front pump, shaft and clutch packs. Still has the flanged output shaft, with a B&T to slip joint conversion.