Lame that you bought what you thought was a stroked 383, but I'm with bomber...set it up right and that "little" big block will still motivate pretty damn well, even with the pistons .020 in the hole.
FWIW, younggun2.0 has a flat topped 030 over 383 (same pistons as yours) with a healthy bump stick and TFS aluminum heads and it hauls the mail in his '69 Dart...first iteration was edelbrock heads, untouched, with a comp 294 solid flat tappet cam and an M1 intake...that thing screamed.
