IMHO the only choice here is which heads to buy. I've driven cars set up both ways, and to me a good set of heads can't be beat.
I must follow that by saying that you really need to match the cam to the heads....just save your money and buy a good flat tappet hydraulic cam.
Like I said, I've tried cars with just the heads, and I've tried them with everything else but the heads, and for my $$$ I would have to buy the heads first. Be reasonable about how you plan on using the car, and don't go overboard with the cam or the heads unless you are planning on building a race car. Power is all about balance....matching parts.
Before you spend money on the engine, do you have dual exhaust and some lower rear gears?
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66 GT Fastback 5.0, 5-speed, cable clutch, JBA's, 3.40 gears, EFI coming soon?
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