LoganDavenport

Hello guys this is coming up on a 1 1/2 year issue.
I can not, for the life of me get my sr to turn over with the key. When I say with the key i mean exactly that...I am pretty sure its a signal issue to the starter because if i un-clip the connector that sends signal to the starter and run a hot wire to the positive side of the battery the motor turns over. Great, so now we all know what the problem is right, fix that? WRONG. I don't believe that the wiring is in any way messed up. The engine harnesses are both Wiring Specialties products, the ignition is also new. The neutral safety switch has been bypassed, (also replaced beforehand) and Ive grounded, re-sanded the contact points on all grounds, within an INCH OF MY LIFE. I apologize for this post but i have done plenty of searching seeing as Ive had this issue for over a year now. I've been dilligently building this car and putting my money into it and i just want it to work properly. I am at my wits end and need some help. Also this motor was installed in a completely different shell, and the SAME EXACT ISSUE was happening...I am 100% stumped..

ECU not sending signal to the starter is my last guess...other than that i have no idea. I have tried absolutely everything I have seen on every forum, and been through the FSM at least 5 times trying to figure this out (so please do not link it to me) I searched, and waited over a year to post this...can anyone help?