Joined: Nov 2016
Hard to guess. I'd really want to look over a motor that someone else built, and appearance would matter. I have seen a lot of engines where someone used good parts that I wouldn't want to own.
For me, buying a salvage yard 5.0 and building it from scratch is the way I'd go, because that way I can see everything as it's done, and know it was put together right. Buying a motor with unknown history is always scary. Was it done right? Was it flogged mercilessly for ten years, afterward? As a prospective buyer who doesn't know you, there's no way of knowing.
At least with it being in the car, you can try and show someone that the engine's in good shape (assuming it's fine!)
What kind of pistons and what brand of roller rockers did you use? E7TE heads? In the end, what I'm looking at (from your description) is a stock 5.0 bored .030 of questionable history, and a set of headers/mufflers I wouldn't use. The roller rockers are a plus, but it's all used. So maybe $400 for the short block, $200 for the intake+headers (which I'd sell) and $60 for the rockers is kind of what I'd see in my head. If you run into a guy that really likes your setup, maybe he'd feel like it's worth around $1000.
I smile a lot. It makes people wonder what I'm up to...