How many miles on are your 302?
I've never heard of a Holly ProCharger before? ProCharger is made by ATI in Lexana, KS. Maybe I'm confused?
Depending upon how much boost you're going to put through her, depends on whether or not you need to be concerned about the bottom end. Are you planning on say 6lbs or 12? Big difference.
If you're serious about going the stroker route, do alot of research before making any purchases. Are you planning on buying a complete stroker short block, or are you going to build it up yourself? I purchased my kit from DSS and overall, was happy with the service. I had a local race shop prep the block and a professional race engine builder do the assembly and notching of the block. I worked closely with my engine builder and helped out when I could. If you do the build-up yourself - get ready for some serious work, grinding especially. The girdle, oil control, oil pump pick-up, etc all needed modification to clear/fit.
Personnally, I would do the build-up again as I know exactly what was done, what all the tolerances are, what is in it, etc. which for me, is peace of mind. However, some like to just pick-up the phone and order up HP. Whatever floats your boat.
E