It’s going to be hard to do that if the OP doesn’t know where the cam is. How do we know it’s not in at 114, or even 116? You can’t tune that out if that’s where it is.
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..
