ramrod;c-159610 wroteThere is no need to change the distributor.
???
You need to remove and block off the head mounted 740 distributor and swap to the block mounted 240 style dizzy.
Its hit and miss sometimes you get lucky and the turbo engine will have the drive gear on the balance shaft for the 240 distributor.
You could swap your existing balance shaft and dizzy in whilst you have the engines out but can be done with the engine in.