Besides weight reduction, what makes the aluminum heads superior to cast iron? I'm not building a high performance street machine, but I just want to know if it's worth spending over a grand vs. just reusing the iron ones I got.
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you can run almost a point more compression in an aluminum head small block.i don't know how well they will handle over heating though.
As you know, up north here in the great state of Minnesota, where lifts are limited, exhausts are silenced, and emissions are on the "Who Cares" list, very little traffic james, if any (6 cars in front is just about as bad as it gets up here). The truck will be strictly street due to the 2wd, and I aquired the 302 conversion kit which includes the high performance all aluminum radiator, so heat really isn't a problem.
Plus, I thought that aluminum dissipates heat at a much faster rate than cast iron.