302 heads

I found a set of what is hopefully 302 heads, should find out later today. I called the machine shop to ck prices.
I can get the heads for $50
valve job $150
cut and install bigger valves $125 (if I choose to go to 1.88 and 1.60)
mill the heads $38 each
replace the guides $5 each ($80)
I would get the new springs in my cam kit, so I would need valves if I went that way and new seals.
so that's about $500 counting the heads but not counting the valves is this a good route?
I'll port and clean up the runners and bowls myself.
the way I see it is if this is a good deal I can do the 318 bottom end without having to buy the high priced kb pistons.