Little bit of a rant about Mopar heads...

I don't believe they allow a throat cut, but I'm not positive. They do not allow back cutting the valve. Seat angle can be your choice. Seat margine is not an issue. Port volume is measured and you want to be smaller than the spec. Guys have ported the heads before, then acid treated them to replicate the cast finish, then milled the intake and exh flange faces to lose the volume they added... I dont know if they measure for that now. Pistons and pins must be stock replacement design and weight. But, generally you don't buy stock pistons. You have them made from a high quality manufacturer and have extras made so they are exactly the same weight. Rings must be stock size and width. Gaps are whatever. Cam must be of same type and lift as factory. Lifters of smae type and weight of factory. There are tricks for everything. Factory intakes coated inside and out, factory carbs that are minimally tweaked... IMO, the best engine for a stock eliminator small block effort would be the '71 340, followed by the 360 4bbl of the mid 70s Volare.