[Lippyp]

Its not the pump drive, I can't get the shaft into the hole more than an inch before its fouling on the block as the top of the dizzy (with the cap off) is being pushed forward by the firewall. I can't jack the tranny up as its tight against the bottom of the firewall, short of either lowering the engine, boxing the firewall or moving it forward I can't see how I can get it in the hole. Even if I can I'm not sure that it isn't going to be knocking against the firewall over every bump.

Yeah, I've found a couple of companies that do the conversion kit, that might be the best way to go for me tbh. Cheaper than a new small cap HEI and gets rid of the PITA points. The Mallory dizzy in there was brand new when I bought the truck so won't have more than a couple of thousand miles on it.