1966 Plymouth Valiant Wagon......Scary Canary

Ok, Ive decided to swap in the 318 while Im updating the 273. HOWEVER, I atleast plan on more headwork (1.88/1.60 valves, better valve springs, more porting) a much bigger cam (something in the .580-.600 lift and 115* overlap range) and building some nasty lookin headers. I still cant decide if I should be looking for a tunnel ram, I DO already have a matching pair of edelbrock 600's and a hood to cut8)

any more sedate induction suggestions? Im shooting for 425-450 horsepower....