I would take the cover off and look. Hopefully the OP will provide more info.

I haven't found any information on the original size/gauge wiring was used so I would go by what was originally installed by Chevrolet.
The problem is finding a 37 truck that hasn't been modified.


"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."