<VV> Engine to Transmission questions

[Jim Danner]

I'm trying to mate a 102 hp engine to a late-model powerglide transmission.  The short shaft on the torque converter does not fit into the hole on the crankshaft gear, though.  The hole is simply too small for it.  My question is:  Were torque converters different from early to late?  Or can you just not mix and match engines and transmissions?  If torque converters were different from early to late, could I use an early torque converter with my late powerglide?