Can you use #6 plug wire to time it? Yes. #6 piston is exactly the same place on the crankshaft degree wise as is #1. #6 spark plug should fire every other turn of the crankshaft alternating with #1. You shouldn't be able to tell the difference with a timing light.
Last edited by Bill Hanlon; 05/14/2026 3:27 PM.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
| 
