261 and 235(full pressure) cranks are the same.

The rods are the same at the journal end but have heavier(larger)pin end that requires use of the larger bore 261 piston which the 235 block cannot handle.

The difference between the two engines is the bore. The stroke is identical.

If you want a 261 you will need a complete short block.


47 Fleetmaster, Hotrod 6, 5 Speed
50 Sedan Delivery, 327, 5 Speed