As long as you do not have ANYTHING connected to the 12 volts but the starter, you will be OK. Do not forget the guages! I had a Caddilac powered Chev back in the 60s that had 12-1 compression, and the way I resolved the starting problem was to use a 6 volt starter and everything else was 12v . I ran the car for 3 years and never hurt the starter ,and it never failed to start hot, which was a problem with the original 12 volt starter
Joe T
37Buick coupe /455 powered
40 Super convert
72 GS455 convert 13.0/105
69 Buick Sportwagon
92 Road,aster wagon
04 Rendezvous
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