Do not go over .500 of lift or 268 / 223 duration . It will be the worst driving car and loose street manners. Some people will go .650 lift but talk to a machine shop and ask the prfessional about a 302 with a .650 lift cam. All kinds are out there. Some people think huge cams, 4000 stalls and winding to 6500 is cool. Not my cup of tea, my vehicle needs to be serviceable and last.
You can do anything with enough money. My neighboor finished a old rat pickup flat bed with a transplanted 500 v8 cadilac with FWD from a late 70's eldorado. It had twin unshrouded , stripped painted, puller electric fans, no grill , and looked like a twin prop airplane getting ready to take off from a stoplight. A fat cam and spooled front transaxle, made it a unusual beast that was driven up from arizona. It was lowered , chopped, had suicide pop doors, a tailgate ramp system. Hauled with all torque power, and that is a incredible feeling. Not that winding scary feeling like how far is he gonna wind it. Whatever..
Superchargers are much fun and the way to make a 302 go. My 305 GM is E forced with a eaton 122, and what a difference. They work. You can flip the log exh manifolds and turbo charge it cheap. NO2 is not allowed on the street and not a option for a useable power adder, unless you race it only. Either way you can make a good driver over 1 hp / per inch easy. My 305 with 6 psi at 5200rpm is around 350 fwhp. Pretty hot for a 305, anyone who disagrees is missing the point of that type of build. A 305 in 1985 made 140hp . To add 210 hp is a hot 305.