While you have done a lot of stuff to it w/upgraded parts, you haven't done much to increase its value over its blue book value, other than the lockers and paint scheme(which could actually limit the number of potential buyers) Rebuilt/new parts only help you get the "Good Condition" blue book value, not the money you put into them, since a vehicle in "Good Condition" is expected to have no "worn or needing to be replaced soon parts" on it.

A good place to start w/pricing is the KBB value for good "Good Condition" for your area, and about half the cost of the 'Upgrade" parts you put into it, then add negotiating/haggling room, then adjust that amount for the market in your area. A clean rust free Toyota 4x4 may bring more in IL than here in CA where "Rust Free" has little added value. If it were here in CA I would list it for $5500, expecting to get something under $5k for it.