W2 heads and intake question

I have a line on some w2 heads and a w2 intake with spare rockers
they have been On a shelf for 20 years so they need to be cleaned
probably will need to lap the valves or cut them etc. Just wondering what they are worth. $1500 , $1000 . $500.00 or should I just use my 2.02 ported "u" heads? These would be going on my 340 T/A block with .030 over pistons. Will they make more power then my U or X heads and are they worth spending the coin on?

Thanks for your thoughts