350 sbc question? 3970010 How much HP?
Ok I have a 3970010 block and on the back of it where the flexplate goes its got 010 stamped on it with 020 right under it. It's a 4 bolt block and I just bought another one and its got the same stampings but this one runs and I was wondering about how much horsepower a block like this can handle and is the 020 anything special I've seen 010 stamped on it before but was wondering if the 020 stood for anything?