273 engine needs cam and lifters

Hello,

65 Dart with a 273. It's time for cam and lifters. I haven't checked compression and leakdown yet. I have a couple of questions. If compression and leakdown check out ok. What's the best option for a new cam and lifters? Should I stick to stock? Second, if it needs heads or worse what engine swaps would be reasonable? I don't want to do heads on this original motor. Not looking to break the bank but want something reliable.

Thanks