So which would you recommend?

[47 Fasttoys]

OK, so I'm still pondering on which chassis to go with. My build is a '47 COE, that being said I have no chassis at all for it right now so all options are on the table. It will be a mid mounted engine set up so anything I get will require major mods.
Option 1: I'm considering a late model 1500 GM, that would get me the 5.3/4L60E combo I want plus a lot of donor parts I could use. On the down side I would still have about another 1000 in the motor to set it up like an LS-1 (I will need the low profile arrangement) I also don't know for sure how hard the steering hook up will be. A good used 1500 runs about 4000 to 6000, plus getting the engine set up mid engine 500 to 1000, plus extras to get it on the road 4000. Total: 9500 to 12000.

Option 2: A mid 80s GM C-10 or C-20, these can be had less motor and trans for 300 to 600 (keep in mind the body doesn't matter), with this a used LS-1/4L60E 3000 to 4000, plus fuel system 600, plus additional wiring 300, plus all the extras it takes to get some like this set up in a virgin chassis 500 to 1000, plus extras to get it on the road 4000. Total 8700 to 10500.

Many have done the mid 80s chassis and it can be made to work very well.
For the late model chassis used on a COE I can find no info for anyone who has done it on a AD body style. When completed I intend on it being a daily driver also used for towing. Pick up style bed.
All input is welcome.
Rob