Check for a air leak at the carb. Make sure the carb base is not warped,same thing with the intake. All bolts tight after warming up?
In my model A (stock) you can leave the timing
advanced and it wont backfire,but let the carb get
a little loose...Bang! Had a 81 f100 6 the
carb came loose a couple of times...Bang!
If you want grey pipes,1 gallon of racing gas
mixed in with a full tank will do it,you will have to reset your idle.
If you want your exhaust to Krackel when you back off the gas,put the muffler at the end of the exhaust with a short tailpipe (couple of inches)
Wick
