Vortec swap in 87 Silverado

[jablack]

I have an 87 R10 with a tbi 350 that runs great, but I need more power. I finally got my hands on a 98 350 vortec I'm going to go through this winter. After rebuild I'll get the tbi vortec intake so I can use all my stock stuff from truck. My question is do I need to put a chip in the computer to make it work or will I get lucky and not need anything done with the computer?..

Here's a picture of my truck and the soon to be new engine.

Thanks guys.