I just installed MSD 6 and Jeg's hot in cap coil in Proform HEI distributor with medium springs. I pulled the plugs to regap to the recommended .050 and I have about 4000 miles on them. They are AC Delco number fives. The plugs showed little wear but were very white. There was only a brown spot on a small portion of the insulator and a little carbon build up on the thread surface. Timings set at 12 with full vacuum at idle and 34 total. Should I be concerned and is this the right plug?
68 Camaro
355 ZZ3 Thorley headers 10.5 compression
ZZ4 cam
GM high rise, Carter AFB 650
350 Turbo, shift kit with 2800 stall
68 Camaro
355 ZZ3 Thorley headers 10.5 compression
ZZ4 cam
GM high rise, Carter AFB 650
350 Turbo, shift kit with 2800 stall
