change the oil at least twice after you get it back together..you might be ok. We are looking at the same situation as if you had an L36 bonneville and had a UIM failure. You might be good to go for a while.
don't use Fel-Pro! i've never used one but that'* only because of all the horrible feedback i've read on turbododge.com about them. but then again they might be ok in NA applications? fwiw, fwdperformance.com sells:
the head is warped beyong repair... the machine shop said it has had work on it before, they could see the weld marks... so it was probably shaved .0010" then, and they said it was warped .0011" now.. so its beyond fixing...
so.. now i either find a good head or a used motor.. 2.5 or 2.5T
or get another beater all together... however, im kinda partial to this thing
gf'* parents have a 73 lasabre for $500 i could scoop