Engine Value?

[PaulProe]

As side-oilers become more and more scarce, and new blocks harder to come by, I am curious as to how much value it adds to a car.

Assuming the same car, a well constructed, as true as possible to the originals, say an ERA, what do you feel the difference in price would be if

1) equipped with bored/stroked FE center-oiler block (390 or 428) total displacement greater than 427

2) equipped with a OEM side-oiler block (displacement 427 or greater)

3) equipped with an aftermarket aluminum side-oiler block (displacement 427 or greater)

I am confident there is some difference in price/value. Curious what the consensus is

Paul