Still have three NOS "dual point Mallory distributors" on my shelf in the boxes. Own my on distributor machine and have for ever but hope like heck I don't have to ever uncover it. Neat old stuff to think about or display but you can stop at any convenience auto parts store in the country and buy an HEI module dirt cheap; if you don't already have one in the glovebox. I build my own HEIs from scrap ones for about 25 or 30 dollars with new cap etc,have the entire rear section of an 85 Chevy suburban full of points and caps NOS Delco. If I am going to drive it myself it will have an HEI in it.
When I put one in a newly purchased 1937 Chevrolet (stock 216 split exhaust only)a few years back; before I drove it home; its owner for the past thirty years would not believe the difference in idle and starting. He had rebuilt distributor and carb and said I was wasting my time and money! He shortly there after put a HEI in his Chevy powerd 37 Ford and never looked back!