85 C10 "Rob Peter to Pay Paul" 5.3 Swap

[Lost81c10]

Well this has been on My Wish List for a long time and I think I’ve finally geared up the courage or as my son would say “at least 95%”, to pull the trigger and go forth with it. I must say that my major hesitation to start on this has been due to my lack of knowledge on a lot of engine/electrical related stuff, but from all the reading/research and with your help I feel like I can pull it off. So, bear with me and with all the questions that I will more than likely be asking as I go through with this project. This will be my first major engine related project, so please take it easy on me with your advice and criticism, but it’s all welcomed non the less…
My current plan is what might seem like a head scratcher but oh well…plan, well I am thinking about “robbing Peter to Pay Paul” Peter being my 01 Suburban and Paul my 85 C10 SWB.

My Sub has served me well since 2001 (155K miles) and now 16 later it’s hardly being used, if any at all and thus the sacrificial one…my 85 on the other hand is my daily driver, but with the 305/TH350 it leaves me with a lot to be desired for and I mean, c’mon, which would be more enjoyable to drive, big ole 01 Sub or an 85 C10 with the 5.3…or at least that’s just my way of justifying my plan to my boss…lol
What say you?
What besides the Engine/Trans/ECU/Harness (which I might just buy one) can I use from the donor?
I don’t plan on a complete tear down of the engine or trans at this point except for some seals and gaskets that are necessary. well thanks in advance for the advice and fingers crossed I don't throw in the towel. more to come.