Ignition question

v8power

Petty Officer 2nd Class
Joined
Sep 24, 2009
Messages
117
I am repowering a 1987 4.3l with thunderbolt ignition, to a 97 5.7l with thunderbolt, does anyone know how i could go about wiring the ignition on the 5.7, using the 4.3 wiring harness?
 

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,344
not sure what your asking but if using standard coils, purple and grey from the harness to the + and - coil and the purple and grey from the module to the coil + and -
 

v8power

Petty Officer 2nd Class
Joined
Sep 24, 2009
Messages
117
I will post pics tomorrow, of the 2 different modules, just wondering about the other wires going to the module.
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
42,537
Don't see an issue with the harness if everything reaches, but if your talking about using a 4.3 module on a 5.7 then there is an issue
 
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