Only runs 40 Degrees advanced

It’s hard to blame it on the box Because once I set the timing up it starts very good and runs pretty good. But that’s the only thing I haven’t tried to replace. So I am trying to find a wiring diagram to bypass the MSD box and use the coil driver that came with the kit. But all the wiring diagrams I find show it hooked up in A timing control situation Being triggered by the sniper I haven’t found one where it is being triggered by the distributor yet