If you have headers or RA manifolds, you might want to by heads that match and save buying new ones.
if it is street driven car and you live in an area where it is cold sometimes when you drive, you might want the heat crossover in place to warm up the intake/choke. Edlebrock D port have this.
But most won’t use the heat cross over, only warm weather drive their cars, so aluminum round ports would be my choice if you don’t have the exhaust purchased yet.
If you buy the heads, I think you waste 1/2 the benefits, if you don’t buy the big roller cam and valve train to match.
The heads will flow well to 0.600 lift so getting a cam and valve train to get you there is part of the decision.
If you are buying, there are better manifolds available over the Torker.
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