68_Sat

I own a 1968 Plymouth Satellite with a #s matching 383 big block from the factory. The motor is the same as in the 68 Roadrunner (high flow heads, intake, exhaust manifolds, and cam). I've been told that this is a very rare car as nearly all others came with the standard 318 in the satellite model. A search of the internet has kind of confermed this as I could not find one other Satellite (regular not Sport Satellite) with a factory 383 HP. Now to my question... Does anyone out there have any production numbers for this year Satellite including engine specs? Or, do you know if this is indeed a rare car? Thanks