Well first off, those are pretty impressive compression numbers! I used one of those testers for live house wires to check the spark at each plug on my 38. It didn't flash when held near #5. I replaced the wire with no change. I then replaced the plug and the miss went away the the tester flashed. The plug was shorting.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!