You just need to watch Bob Waldman's great video that highlights "What to look for in buying a Pagoda". Not much emphasis on original engine blocks. I agree with Bob Waldman. For me, I would much rather see matching numbers in the original body panels. Original spot welds, no rust, no body repairs. A laser straight Pagoda with great door, hood and trunk gaps, for me, is much more valuable than a Bondo filled original block car. These are not Corvettes, where the engine block often determines the value. Condition is the key with Pagodas.
That being said, if having an original engine block floats your boat, go for it.