Cool, I wouldn't use the stock 318 roller cam anyway it's just a copy of the old 2-bbl cam (tiny!) in roller-tappet form.
I just remembered I think Hughes sells a cam snout extension so you could just run a stock replacement 5.2 Magnum cam with that extension and all the normal LA stuff (mechanical fuel pump) would work.
Edit: just realized you'd need roller lifters though which aren't very cheap...
