Dave is correct. Imperials are "D" bodies. On another list, there was some debate as to whether or not some New Yorkers were also "D" bodies like Imperials or if they were also "C" bodies as Newports were. Some people believe Imperials became C bodies after they adopted unibody construction in 1967. Others debate whether or not E bodies are merely short wheel base B bodies, so we aren't alone in these debates. :-) Calling Imperials "Y bodies" strikes me funny. Nobody ever ever calls my '72 Satellite Sebring an "R body" because its V.I.N. begins with R. Nor has anybody ever referred to the '68 Charger R/T I once owned as an "X body" because of that letter's use as the lead off in the V.I.N. Both are B bodies. One friend, familar with Mopar's designation system, was surprised to find Imperials V.I.N.s also used the "L", "M" and "P" second letter to identify the price class. As far as he's concerned, ALL Imperials are P (Premium.) :-) Ken Josephson '68 Crown Four Door '72 Plymouth Satellite Sebring '59 Plymouth Suburbans (two) '59 Impala '66 C-10