HEI distributor...

I was going to use a loooooong neck one on a 440, but it still fouled the Trick Flow heads. I have used many of these Chinese HEI dists over the years, on various engines, well made, zero problems. You will probably have to fabricate a stop to limit centri advance, as they have a LOT of advance out of the box. On the cross bar that holds the rotor, you will see two holes inboard of the rotor screw holes. I use 3/16" screws & nuts in those holes to limit the curve. Have the nut facing the top. You will probably have to grind one side of the nut to get the reqd amount of advance. The nut may interfere with the rotor mounting bosses, a little grinding reqd for clearance.
I have also heard of folks welding a stop in place.