I might be interested in a kit but my engine is the least of my worries. If Buffy was making a AR5 kit I would very interested because my trans has seen better days. My point it that most VXers will only be interested in upgrading to a V8 after blowing an engine (this guy included). Once the engine swap is proven like Jo & Chopper said, I think you could do well with the kits but plan on having buyers over years not months. There's nothing wrong with making money on your hard work. I would rather pay you $700 when I need to replace my 3.5L than $500 now for an engine I may not need for 5 years.

If you build it, they will come.