YR is a 72 model 350 V8 2 bbl 175 hp automatic, The heads for that engine should have been 7H1`s , but you have 73 model heads (46) from a 350 150/175 hp engine,...
doesnt sound like you have a lot of power from that 350, even w milled heads
and I dont know about the intake

You may see if Q has any words of wisdom for the "value" of the heads,,...(he`s on vacation, back tuesday, unless he checks in on the board before..)