440 source heads on a stock 440

I would not worry excessively about compression at the moment, put good heads on it and go with less duration on the cam. And you can use 87 octane pump swill. Using a .904 lifter, you should be more like .525 lift at 235 degrees @.050

The stealth's make more sense than putting money into iron heads, unless you can do the work yourself or get it inexpensively. S/F....Ken M