Could also buy a prebuilt thermoquad from demonsizzler aka thermoquads.com I'm sure setting one up for a stock 318 would be a snap for him and he should be able to have it tuned right out of the box. If you don't like that idea, then I'd suggest an edelbrock 600 with a spreadbore adapter plate. I've got a holley 650dp I'm trying to sell but I don't think that carb would be the best choice for a stock 318.