you can also send the wiring and computer to wait 4 me performance.com they will modify the harness and program the computer for $320.
when you get ready to drop in the new engine IF running stock exhaust manifolds remove them, after the new engine has been mounted and bolted down install the manifolds and you will have to grind about 1/4" on the passenger side to clear the chassi, by now you know you wont be able to clear the A/C so remove it or get a relocating kit, personally I would not notch the chassi.
If you have any further questions and you will keep posting or contact Mark at
http://www.hotrodlane.cc/PDFFILES/85...s2%20truck.pdf they are the swap specialists.