Early 70's electronic distributor

Wanting to convert 69 stock 340 to electronic ignition. Is there a problem with using a stock distributor from a 71 or 72 360? I have a couple of distributors I pulled, cleaned up and seem to be ok although I haven't checked vacuum advance to see if it's working. I thought these would be better than some of the later junk that's out there. Am I wrong?
Maybe, maybe not. It will depend on the specs of each distributor. I'd get one setup for a 340 with your engine/transmission,rear axle specs.