Starter sticking

Wiring up an electronic ign setup on a former lean burn vehicle, from what I understand the starter relay wire that only gets power when cranking goes to the coil + wire along with the ballast resisted keyed hot correct? That way the coil gets full power when cranking and resisted power when running? Tried to wire everything up that way and the starter cranks when the key is at crank but will continue to crank after the key falls back to run. Probably something simple but I have no clue

Sounds like you have something feeding "start" when in the "start" position.
Something is looping back to the relay causing it to stay engaged.

That's what it sounds like anyway.

Starter relays can also stick "weld" itself in the start position due to low cranking voltage, but that usually won't happen every time you try it, and what you are describing will if it's getting power looped back to the starter relay when cranked.