Walker won't turn over

[Tbird Walker]

Hey all, scratching my head trying to figure this one out. Have an 06 MTEFI that I did an engine swap on to the 23hp carbureted version. Changed wiring harness and had it running. Now it won't start for me though. Fresh battery. Starter will crank if you jump it. I have checked and rechecked the safeties because I'm guessing if the safeties are open it will crank and crank all day without getting spark. Replaced ignition because I wasn't getting continuity between Battery, Accessory, S1 and S2 when I turned the key to start position. New ignition did the same thing, apparently that was fine. Replaced the Time Delay module because I don't seem to be getting a ground to Relay A that feeds to the starter solenoid. Still nothing I replaced the 30 amp main fuse, also the A and B relays. No idea what is going on. Any help?