milled edlebrock heads

[88workcar]

I have a set of elelbroc performer heads, They had 60cc chambers and 1.94/1.60 valves. They have been milled .020, the mill actually cut a fraction of the outside of the valve seat. Will this hurt anything? and what size are the chambers now? Should I do any clean up work on them (ports) or leave them alone. I hope this will make a drastic differance on my combo.

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Jason B Johnson 88LX 206,000 miles, cowl hood, drag lites,92 stock short block with 96,000, E7 heads 1.94/ 1.60s,4.30s,B-303,long tubes,tremec,cobra intake,19lb-40psi,race pully,short belt,aulmdrive shaft,homemade ram air,70/100 hp NOS dry, 70/30 lake woods, 4cyl springs, air bags, boxed lowers, stock uppers,1.6rr,MSD 6-a & coil, timing control, batt in rear,drive it like I hate it.
12.98@108.64radials 2.0 60ft
12.59 @ 108.55 slicks 1.79 60ft
12.11 @ 111.898 slicks 1.64 60ft, NOS 100hp jet, 550-600psi bottle