+1 on the HEI! It's a pretty easy conversion, assuming the dimensions of the mounting are similar to the 235/261 engines. I machined a HEI distributor for an exact fit to a 261 recently, including a custom-made hold down bracket, and that approach works a lot better than trying to adapt the wobbly bracket from the rotating-housing original distributor with the vacuum advance. Be sure you use a big enough wire from the ignition switch to the dizzy, without any resistors in the circuit.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!