Ok...This ought to stir the pot...

About 25 yrs ago I bought a set of milled 390 heads off a machinist, He told me I should check pushrod length. He probably seen my eyes glaze over, didn't have a clue back then, pre www for me.
On decell. pop pop pop pop, I fixed that by always putting it in neutral and using brakes.
Ran strong so I said F it. I`m edge e ated now:D