How much HP will it deliver?

Does anyone know the maximum lift and duration I can have on standard heads planed 1mm?

of course they are proffessionally ported and has has 2.02 valves as well.
It looks a kind of like package 8 on this site:
http://www.buschis-place.de/mopar_360cui_performance.htm

p4529424 pistons
bored 0.60, 9:1 comp (heads planed about 1mm, New CR about 9.78)
Will install windage tray.
Now I have a crane hmv 278/290 (thinking about changing it to a hotter cam)
the heads like I have described.(at shop getting the job done theese days)
have a edelbrock rpm intake (thinking about changing to the rpm airgap)
holley 850 dp on top.

It kind of looks like package 8 and 9 on the link except the cam.
I still want to run a hydraulic flat tappet but wonders haw much lift the heads allows, and konsidering the piston clearance?