Fuel injection or aluminum heads

73duster513 said

I have a 1972 stock 318 other than eddy 4 barrel and intake with stock manifolds. Does not smoke at all; 727 transmission/8 1/4 suregrip rearend 3.23 gear
I would like more power and reliability I drive on the street and highway mostly I want to be able to jump on the highway and run 70 mph for 2 to 3 hours without having the rpm tapped out for that long hence why I have 3.23 gear
Parts I already have to put on it
Purple cam 410/425. 211/218 @ .50/110 c-line
Msd 6la with distributor and blaster coil
And a set of long tube headers (unknown manufacturer)
I have roughly $2500 to spend as for now

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WHERE do you want more power?
Off the line?
for passing?
at 90mph?
In First gear, Second, Or top Gear?
EFI does not make more power; well, at your power level not worth talking about anyway.
Alloy heads, with no other changes, over your current heads, just the material alone, will actually cost you power.
YOU did not mention having a hi-stall convertor, which is the FIRST place I would stick my money.
I highly recommend a compression test, with this cam in it, before you spend a nickle

Bear in mind that most guys wanting "power" are usually looking for bottom-end "torque" and tire spin. With 27" tires and 3.23s; 70=2815@ zeroslip, maybe up to 2900 depending on terrain. I have run a 2800TC on that and loved it.