[Turk]

$20K will not buy a WELL built 427 side oiler with tunnel pot heads.
Sure you could buy it, I doubt it will be something you would put in your car and not touch it. I agree with above comments. If I was to pay that kind a money for one, it would get dismanteled and looked over and reassembled.
RIght there is another $2000 to $3000. Maybe more if you sonic test, pressure check and measure everything. Probably more if you don't feel comfortable with some components and have to replace them.

If you are willing to spend upwards of $20,000 why not start from scratch and have it built for you by someone you can trust with parts you had a hand in choosing?

I have a 427 Side Oiler in my current car, that WAS in the car when I bought it. Know very little about it, and don't even have a cam card. I know who built it, but then again his reponsibuilty is not to me, it is to whomever he built it for.

Big decision!!