have a 94 5.0 auto car that i bought with a locked up motor, used a 93 older longblock and got it all back together and it has fuel and spark but will not fire ive probably re dropped the dizzy about 50 times and used 2 different ones as i have a whole nother 94 5.0 auto car, tried computer swap, tfi swap, completely stumped this thing wont even back fire off ether or anything