What cam should I get?

I never hear that. Maybe 273 are different but I don't think so. Its not that hard to check, the shafts make it easy, just get a dail gauge and depress the valve and see. Its always the springs that are in the way, its racers running over .500 lifts that get in to that problem. I have hear iffy stuff about Hughes racing--like cams that go flat fast--I look at their site and it seems like once you buy 1 item they act like you need everything they sell for your motor to work right. I don't like that thinking, I would stick with Comps or Crane. Comps told you the .480 lift cam would work good and if the motor had a lift problem they would have said something. I would stay away from Hughes myself. Like you said its not a race motor.

Come to think of it, I have a old story from "Hot Rod" mag. back in 1967 call "power mods for Mopars 273" and they put a .510 lift cam in it. They did not do anything the to valve guilds just change the springs , Now they had only .018 of opening clearance which folks today like more but it work for them.You call get it in a book call "Musclecar & HI PO Engines" its Chrysler 273-318-340&360 From Brooklands books, it has old hot rod storys from the 60's and 70's. That Hughes is full of crap it sounds like