[DanEC]

A bit more time now and I can re-cap some of engine info in Colin Comer's book, "Shelby":

3001 - 3071 S/C and Competition models - not all numbers used. I believe the competition models used higher compression side oiler blocks, MR parts, single 4bbl and other changes and were rated at 485

3100 - 3200 cars with LR 427 center oilers with dual quads/425 HP.

3201 - 3305 +/- cars with LR 428 PI engines with single 4bbl/385 HP

3306 - 3360 +/- cars with 427 MR side oiler engines wth single 4bbl/410 HP