Fully Built 225 Slant Six Pricing Question

Hello! Long time reader, first time poster. I have a 225 Slant Six in my 1963 Dodge Dart that is quite built up, and I'm looking to sell it so I can trade up to a small block V8. The problem is, I have no idea what it's worth, and I feel like I'd get more value selling it as a whole, rather than parting it out (which will also take a lot longer).

Here are the details:
- 225 Slant Six Rebuilt about 15 years ago, but only driven about 10-15k miles since. (At most.) It sits a lot, job takes too much of my time.
- Bored 0.060 out, crank ground 0.10 under, decked, ported and polished, bigger valves, Isky cam (not sure which one).
- Jacobs Ignition
- Pertronix
- NGK Plugs
- Taylor Wires
- Holley 390 CFM 4 Barrel
- Offenhauser 4 Barrel Intake Manifold
- Headers
- Mini High-Torque Starter
- Lokar Throttle Cables
- K&N Air Filter
- Slight oil leak from the valve cover.
- Had a AAA inspection about 8 years ago, came back clean except the usual little leaks and creaks.
- It runs, but the carb needs a refresh, it didn't get driven much during the pandemic, so it sat for a bit.

So, the question is, about how much should I ask for the whole package?

Also, I have the original automatic torqueflite that was rebuilt about the same time. It runs and shifts fine, but has a small leak at the pan. What's it worth separately? As part a package with the engine?

Thanks!

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Go see a shrink and get yur head straight. Fix the minor leaks and drive it. You will lose a pile on the slant and cost a pile doing the swap.