383 = no love

and I can't recall how many 340's my 383 has chewed up, along with 350, 383 and 396 bowties too.
383 with a ported head and the right valve trane will rev to the moon and make power beyond.

I had a completely stock 66 Chevelle SS 396, 325hp. On 205/75/14 white walls, it ran low 15s. It was sad but that's about all they did.