I don't actually believe that there is a 302 block shortage. I think it is more of a business case issue. While there are thousands of 302s across the country in junk yards and back yards, it is difficult to try and build a engine business plan on that context. Blueprint does not require a core which means no core charge, no shipping cores, no inspection of cores, and no department dedicated to dealing with cores (core blocks can be a mixed bag). Also, BP offers one of the best warranties at 30 months compared to most at 12 months. That would require fluxing every core and even then a 50 year old core could have issues not readily identified in the inspection process. Point is, if, and this is a big if, BP can indeed make their own reliable, high standard USA 302 blocks, and have them when needed, their business model works well. I am hoping in support of the resto hobby that they get this system working.