I should have mentioned that the engine is used in a 53 GMC truck, which is roughly 3000 LBS or even a bit less.
I am definitely going with aluminum heads - because they are lighter and well.. I just want to use them.
I would not want to lose low end torque - maybe I should stick with original cam then?
Smaller combustion chambers on aluminum heads will dictate the use of higher octane gas - fine with me.
I can try using existing timing tables and increase the numbers slightly. Is that the best way?