My engine builder is wrapping up my 324 Oldsmobile. While it's more or less a stock build, it's also about as fresh from the factory as can be with everything either new or rebuild. I'm about double what my buddy has into his recent Chevy 283 build, but I stopped tracking dollars and cents when I started rebuilding my 69 Pontiac Firebird at 16. In my opinion, there's a value factor in opening the hood and having a unique motor. And I'm not talking about third party appreciation at a car show, but my own appreciation. It's the same reason why I stop to look longer at a car with a straight six, or a Nailhead or a built Y-Block than I usually do when the there's the standard 350 Chevy with 3x2s and Edelbrock valve covers.