440 valve to piston clearance question

I have a low-mileage '73 440 out of a motorhome that I am going to put in my '71 Charger. It has flat-top pistons with no valve reliefs, and does anyone know what camshaft lift I can expect to be able to safely run in this setup? I was also thinking of milling the heads to get more compression, which of course will limit clearance further.

Dave

.484" MP will clear

A 73 440 will have the pistons about a 1/2 mile down in the hole. Okay actual is more like .170-.180 in the hole. You are not going to have trouble with valve clearance. Unless you want a total pig of a 440 on the street, don't pick a cam with more than 224* of duration @050 on the intake side.

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a total pig of a 440 on the street,

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Excellent point, between having low comp and no quench, a big cam is going to not give you what you are looking for. I'd mill the heck out of the heads & fyi some 73 model year heads had hardened seats & some didn't. Or consider some better ones.