Not to mention, if he plans to replace pistons later - why buy a cam now and a cam after the compression bump?
Going to a 102-104 ICL will gain some pressure and low-end while only losing what he's not using (since OP says he's not tracking the car).
I'd advance the crap out of it, then focus on timing/tuning. Once the new slugs are in, a more 'optimal' cam would make a ton of sense. Right now, it's much more of a gray area.
OP should probably start with some pictures of the spark plugs. That should help give some better guidance than blind recommendations at timing and tuning..
