For a ProTouring car you're planning on selling

[camcojb]

If you were re-doing a car, say a 69 Camaro with the intent of selling it when finished, what powerplant will be easier to sell with and value considerations?

Say a 69 Camaro with minitubs, Fikse, DSE 4 link, Wayne Due front end, T56, etc. A high dollar new car with excellent paint, body and full invoices and pics of the new sheetmetal etc. It already has a 700 rwhp ProCharged small block, but he's thinking of doing a n/a 540 big block (Dart iron block, aluminum heads) that would make say 750 hp on pump gas (crankshaft hp). He's thinking that the small block may scare people off even though it runs on pump gas also. It will cost him an additional $3K-$4K to swap over after selling the small block.

Besides the cost, would a naturally aspirated big block be an easier sell?

Jody