Heres what happened had a 88' with a 4.6 stroker in it. Got rear ended last october and the frame bent in the rear. In february got the 91' drove it for two day temp gauge went out over heatet so bad cracked the head and blew wholes in pistons 1 & 2. So i took the renix block out of my 88' put the 91' flexplate on it and put it back in the 91'. Found another 7120 head and had just a basic valve job done. So everything went well til i realized that there are no studs on the renix block to mount the ignition coil. So i pluged it in and i just let it sit on the motor mount (for now) and grounded out by the same wire of the alternator. So now i have WEAK SPARK and the engine will not fire.

What ive replaced and tested:
Ignition coil
CPS
Maf sensor
TPS

any ideas people?