Anybody done an in-car cam swap?

I about to go retrieve my 360 from the machine shop, and I have a 340 cam that I was going to originally reuse. I was thinking about buying a .480 cam though, I figured installing it on the stand may be easier. Should I do it now or later? I'm kinda tight on funds, so I was considering holding off on the cam. This is for my 70 BTW.

Thanks