I have a bone-*** stock 87 Formula with a lg4 w/ q-jet. The motor runs perfect with only 79,000 miles but I am wanting a little more power. I have a 4 bolt main 350 short block ready for heads and am wondering which head has the best bang for the buck. Should I use the original 305 heads and put in bigger valves, use the h.o. heads or buy a whole different intake and put the vortech heads on? Any advice is appreciated. Thanks, Bret

What is the casting number of the heads you have now?
If they are the 081 heads you already have the equal to a "HO head" but with centerbolt valve covers. 87+
Takes more than just bigger valves to bring out the power. Needs a full port effort. The potential is there. You have to invest the effort.
Its a bit time consuming.
Vortecs are a great bolt on. Hard to go wrong there.