compression question

I'm having the engine rebuilt in my '68 390 AMX. It has the close-ratio 4-speed with 3.15 gears. I want to be able to safely use readily available premium pump gas (91-92 octane) in it. Can I safely do this with the stock 10.25 compression? (I hear the AMC V8 is not overly compression sensitive.) The engine will be stock except for a slightly more aggressive hydraulic lifter cam. Or should I use lower-compression pistons? Thanks in advance.

Like SKeown said. I have about 10.4:1 static compression if you take into account the overbore and it runs on 91 octane. Make sure you have the timing set right for your driving and available fuel. I would also suggest that you check with the cam manufacturer for their thoughts, cam selection can make a big difference to engine detonation. 

Hardened valve seats on the heads as well for the unleaded gas. Otherwise you can use a fuel additive every time you fill up to keep the valves lubricated.

Summit Racing has a Compression Calculator on their website. Get accurate compression without the guess work. Info needed is: bore, stroke, cylinder head volume, effective dome volume, deck clearance, compressed gasket thickness, number of cylinders. Then the calculator determines compression ratio and total displacement.

Thanks for the input, guys. I'll check with the builder and see what he thinks. I'm thinking somewhere in the mid to high 9's might be a good compromise.