I still think that the 35+21 and +12sct tuned motors are just as fast as the newer nova engines and are a better buy for your money. And they can take alot more abuse. I have seen many pro racers use the 35+21 and +12sct with flash and 353 heads on them to promote the newer engines. If you have the money great buy the new stuff if you don't buy what you can afford it will still be fast.