.054 Whats your spark plug gap?
I have the bucking jolt issue and have tried all the fixes, I went back to the beginning and re-replaced the autolite plugs that had a variety of gaps from
.028 to .042, I noticed the sticker on the radiator brace and the gap was .052 to .054 per factory specs. it seemed to run better but will do some highway driving in the morning. went back to motorcraft plugs. dr