Help on rebuilding a 73 340

Dont be in too big a hurry to swap out that TC. Pick a cam first. If your down on bucks, leave the 340 cam in there and use the current TC. That will save you enough green to buy a nice set of headers(which I dont see you mentioning as being on the car yet.) I think Rusty nailed it.For your driving requirments,and the current parts list, and a restricted budget, hes on the money.I would even run it with the 3.55s.That 73 will surprise you, especially since youre used to a teener.Give it half a chance to prove itself. Then if/when you discover a deficiency you will know where to spend the money youve saved up.
There is of course lots of other good advice in this thread. I just sense that you are more interested with working with what you got. And theres nothing wrong with that.If you really want to get inside that 340, pop the pan,clean it out, and check the bearing clearances.
I say; run what you brung.