@Tiddlar
I just wanted to chime in and say hi and see if I could help and answer any questions. Our office is closed today, but feel free to message me here if you want! My name is Dru and I am the Product Manager for BluePrint Engines.
On our 632 crate engine, we use our own castings. We used to buy blocks from Dart or World, but we started casting our own blocks a few years ago (yes, its cast in the USA). That was a huge factor in us being able to build the engine for such a good price! We also offer a great warranty for any manufacturing defects or parts we provide on the engine. We sell engines all over the world, to a lot of customers - Jegs, Summit Racing, Speedway Motors, Rocket Industries etc... If we didn't build a good engine and stick by our warranty we wouldn't still be able to do business with all of those great companies!
Someone else had a question on our advertised horsepower numbers… those numbers are from the crank. There are a lot of factors that have to be considered when figuring rear wheel horsepower and its just impossible to figure without having the engine installed in the customers vehicle and on an engine dyno. Here are a couple of examples of our PS6320CTC installed:
https://www.youtube.com/watch?v=3I1nt-cZnnA
https://www.youtube.com/watch?v=GP6fEUHvSY0
So as you can see… our engines go in everything! Thanks again for considering us and let me know if you have questions!
Dru