Engine/ Trans Combo?

OK. I fanally have a little bit of time. Work is crazy. Thank you for all the help and please keep it coming. I know the combo is not ideal so here is why it is a thing. My dads truck motor is done. I am giving him my built 225 slant 6. He also cant work the clutch pedal any more so there goes my Barracuda 3 speed. In no way complaining but Dad tought me all I know and has sacraficed for me. The car is a 1964 Dodge Dart. 8.8 Rear. Disc brakes on all four corners. V8 Leaf springs. Small block torsion bars. I bought it when I was 16 for $300 and it has survived me being forward deployed to Japan for 7 years and 2 years in the sand box so it is not going anywhere. Family man with three kids leaves little room for toys on a Military pay. I will be selling the Cox Brothers roller rockers from the 225 and a four barrel manifold from 6=8 to help fund the build. Also have a set of big block torsion bars to sell. Last but not least a complete V10 from a later RAM rebuilt just in case anyone is looking. Again thank you for all of your help.