305 TBI to 350 carb

[Low87]

Looks like I might actually be able to use some money for the truck (about time). I'm looking at the Chevy crate motors, just want the basic 350. How much am I going to have to change to go to a 350 with a carb from my current 305 TBI. I know the fuel pump will have to change (that would make fuel pump #8 on the truck). If I've got the bucks to spare, I want to rebuild or replace the 700r4 while I'm at it.
1) What will I need to do with the computer? New chip? toss it?
2) What all 'extras' am I going to need to buy along with the crate motor that I can't use from my 305? Carb obviously, but what else?
3) How much should I be looking at to spend on the crate motor?

Any tips and advice will be greatly appreciated!

BTW, I'm back to the pavement business, hauling epoxy in my truck and working on driveways in the 100 degree heat. Nice pay but no time for much else. I'll try to make it in more often though.