In low dollar builds, I do not think mopars are more expensive. Per say, I think a '77 318 is superior to a '77 302. You start out with a better performing engine, a stouter bottom end and superior cylinder walls. I see it as "cheaper" to build.
I agree. I think that I just freaked out when I saw the price of a intake manifold. I think for now I'm going to just do a couple of bolt ons, 4 barrel, dual exhaust