Total advance question

halifaxhops said
Matt your DC book have that one in it? I actually have no MP specs can use them.

It has a general graph for the vacuum advance distributors, althought it doesn't actually list the 383 distributor number. Careless goof, or what? Who knows? The green lines here.
(Ehrenberg claims the B engine MP distributors he sells copy the 440 curve but doesn't say which one. )