to be obvious

but have you checked all cable connections for corrosion? the ground strap at the body and the motor? look for damaged cables too. sometimes an auxiliary ground wire from the neg on bat to the starter bolt will do wonders.

also the wire to the alternator.

good luck

tom w

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.