First off I despise 383's possibly more than the 318. The 383 has no right to call itself a big block. I've built more than a few and they always disappoint. ALWAYS. I've actually been refusing to build them if the customer wants a " stock rebuild, im only cruising, don't care about performance" etc... Because they always lie. When the numbers are in they are always disappointed and ask " Why is the HP so shitty?" And they don't like my answer. "Because you insisted on a stock rebuild and lied about not wanting performance" I always suggest a 431 build or something else..even a small block. Oh and Nick's dyno must be off because any 383bIve built needs headers to get to 349hp. His engine is either amazing "although the TQ numbers don't suggest that" or his dyno is very forgiving. I love his head scratching.....Why is it so low? Because it never made 425tq in the first place. A 383 Chev seriously embarrasses our big block. Oh and anyone saying they had a strong 383 back in the day is delusional or never drove anything faster than a 1984 Dodge Magicwagon. J.Rob