273 swap to 318/ build, cost, potential, daily driver

That is not like an aftermarket cable shifter. If you get a good transmission guy, he can make that trans work good.
If I may ask, if you’re familiar with my current situation, which option are you in favor of? Trying to revive the 273 that I have, looking into an LA 318 or a magnum 5.2 for this application? Or any other “path of least resistance” options I might be missing. Thanks!