Well, if you really want to go for mileage, and try to keep it Mopar-ish, grab a Carter ThermoQuad from a '71 (
https://www.summitracing.com/tx/parts/sum-210232/applications) and a Edelbrock Performer 440 (
http://www.edelbrock.com/automotive/mc/manifolds/chrysler/performer-bb.shtml) and try it out.
Personal Safety Disclaimer: To prevent myself from being stabbed, shot, maimed, drawn and quartered (I don't mean 4 pencil or crayola renderings), hung, tarred and feathered (or just tarred, I could do just feathered), tickled 'till I **** myself, or having Walter Chysler's ghostly apparition commanded to haunt me, by any member of this forum, understand that
this is not a personal endorsement or recommendation for the above option. Good luck, have fun.
