alright lets see if i can answer all these questions. very very good questions lol. ok
1. no i do not have the engine and tranny as i havent been home to check them out first but i have found a few places to purchase them. i am going to get a fairly high mileage engine that is $4000 or less. my uncle is a professional diesel mechanic so any rebuilding neeing done he can teach me. the tranny i have found on two sites and it is a little costly but it is an awesome tranny and you get what you pay for most of the time.
2. no i havent looked at the wiring harness cause i dont know enough abot wiring engine control( especially on a diesel) that i wouldnt know what is good or not. when i get home i am gonna make up a detailed build plan and have the guys at the shop and the bolters help me find the parts i need.
3. the K20 body is in amazing shape. there is one rusted out piece under the drivers door and i 10" hole in the floor board. other than that there is no major defect with the body. and it has factory A/C which i think is amazing!!!!!!!!!!
4. brakes. yes i am gonna get a disc brake conversion for the rear brakes and get the largest cross drilled rotors i can put in my 18" rims. the truck already has a brake booster in it but i am not sure how that one is going to work with a diesel since it is vacuum powered.
5. the truck will be my everyday driver when finished. i help my brother run our family farm so it will be used for towing a couple times a month but nothing heavy duty like towing tractors or anything. just a 16' flat bed tandem trailer and a 17' tandem cattle trailer. i am planning on putting a tow bar underneath as well. but again i wont be doing much towing at all and the towing i do wont be heavy duty. the 14 bolt full float and the dana 60 front should handle it fine.
6. i am going to find or replace gearing to get a chevy 14bolt full float and a dana 60 front end to 3.73 gearing. so i shouldnt have any trouble with towing and i should pull around 20mpg on the highway. i dont want too low geared and be diggin for nickels in the couch just to go to town LOL.
hope that gives you enough to chew on your thoughts for a little while thanks for the questions. i always apprecate help.
Jonathan