I never understood the 383 designation, is it because it's designed around a smallish bore/intake valve?

If 4.25" is considered small....but since BB Wedge valves don't open on the bore centerline....

WIZE

World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker!

https://www.youtube.com/watch?v=-mWzLma3YGI

In Car:

https://www.youtube.com/watch?v=PjXcf95e6v0