Definately get the fuel pump and gas tanks if you can out of the donor truck. As for wiring the engine, I would use the engine but buy a whole new TBI setup from Holley.
www.summitracing.com or
www.jegs.com have complete TBI wiring setups that are more modern and will probably out perform the stock TBI. The installation will be easier too. Check on
www.ebay.com for a TBI converions book. Check your local library or book store too.
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Gerardo
1983 Custom Truck
TX Plates: "BAD BOW"
http://www.geocities.com/abetterchemist/