small block crank

New to FABO and I thought I would ask a question I believe I know the answer to but would like more input. I have a 340 and went to install it in front of a 727 and the torque converter hub would not fit in the pilot of the crank. I believe the crank is from a 273 but I have not found any information to confirm this. Any info would be appreciated.




1974 Dart Sport / 318
1967 Dart Gt / 340
1967 Barracuda /400