302 heads for 318

Exactly. When I did mine I bought a piece at a time until I had everything, cam with accessories, headers, intake and carb.

Installed everything, broke the cam in properly and let er rip.

And if you are doing a cam swap, might as well throw a new water pump on it too while you are there.
I agree why do it twice on the intake? also agree on waterpump if you dont change it then you prob will down the road sooner than later been my experience,I'd wait and do it all at once including a good roller timing chain and headers,what cam you go with?