UPDATE: I got the nerve to put the key in and turn it...wa wa waaa. She didn't start. New fuel lines, new gas/water separator, rebuilt carburator, new water pump, water jacket stud kit, new thermostat and thermostat housing, OPSS, EWDS, new spark plugs and many many many hours and dollars and nothing
Ndutton came by and we ran a bunch of tests...
Compression: #1 was at 115, #2 at 95 (sparking stopped), #3 100, #4 100
Spark: Only #1 was blue/white and the others were yellow
Timing ok
E-fuel pump test (external tank to inlet, outlet to jug: ok, fuel pump is pumping fuel
Fuel tank/carburator test (line from external fuel tank to e-fuel pump inlet): tbd...I havent done it yet. I'll let y'all know. If the engine fires up, I'll know that the issue is coming from somewhere between the internal fuel tank and the e-fuel pump.