I just finished both of mine on my '85 over the weekend. Granted, I dont have EFI like yours, but if you're gonna do it, prepare to do most of it. It wasn't hard, but wasn't fun.
I did both tanks, both sending units, 3 hoses each (supply, return, vent) between each sender to the metal lines (going to Pollak valve). When they drop the tanks, there is only a few inches of fuel line, and will need cut (at least for factory pre-EFI setups). I put two feet of each line on each tank so that putting the tank back up is easier. 3 of 4 of my brackets were completely rusted out, so I replaced all of them with new bracket/straps and rubber squeak prevention (I used rubber strips from flooring department). You may also need the fuel neck assemblies to go from the tank to the bed - mine were swiss cheese.
I didn't replace the Pollak valve as I've never used it since owning the truck... maybe it works, maybe it doesn't. I also didn't reinstall the plastic rock shield for the tanks.
If you need brackets/straps, make sure to order 2 front and 2 back. Also, be aware that the fronts have different bolt patterns for each side. If you order front brackets that does not have nuts welded on, your installer will need to weld some 3/8-16 nuts on to the bracket.
You can find almost everything you need from LMC, with exception of 16 gallon fuel necks. If you have 16 gallon now, I would suggest changing to 20 gallon. Parts are easier to find. I wasn't aware of this until after I bought the 16 gallon tanks.
