1965 Dart 273 fueling options

So the bolts are smaller at 5/16 instead of 3/8 and they are at a slightly different angle so you would have to come up with some wedgie washers and smaller bolts to make a newer intake fit... Or... you can spend you know some more money and just buy a set of heads maybe even worked over and the intake will fit but I can't say the torker intake would be the best choice for what you're doing but maybe I don't know what you're doing...none the less...a dual plane intake would be more helpful for power to get up to speed quickly.
So I've got a kinda brand new 600 CFM carb and this intake. Bought em both a few years back for a 66 Dart GT that has since been sold.
Any recommendations for heads?
I'm thinking what ever is most common might be the least expensive. Again, not building a racer, just a little peppier Sunday driver.