Painless or not?

[Larry S]

I am putting a 96 5.7 in my 69. I have my chassis done and the cab is almost ready to go to the blaster, and when I get it back on the chassis, I'm planning to start with the wiring. I have the complete 96 donor truck. I'm trying to decide if I should use the harness out of the donor or, go with the painless. I've never done this kind of swap before. I'm sure I will have to have my computer reprogrammed, and I hear Painless will do this for free if I buy their harness. Is this true? How much will the painless cost me? How "painless" is the Painless? What do you guys recommend and any advice from you guys that have done this swap will be appreciated.