There are no differences in the floor pan from Chrysler to Imperial (firewall back to the trunk). They both use the same floor pan stampings. And the differences between the Chrysler/Imperial floor, the Polara/Monaco floor and the Fury floor are all in the extension section between the front pan (front and rear floor wells) and the centre floor pan (rear seat). The front, centre and rear (trunk) stampings are shared across the board (except wagons). However, the Imperial was on a 127" wheelbase while the Chrysler (non-wagon) was 124". A difference of 3". You measured the distance from the firewall to the radiator support as 40.625" while the Chrysler was 37.5". That is a difference of 3.125". That just confirms the extra length of the Imperial wheelbase was in the front stub. And, yes, the Imperial had many extra added features to make the Imperial a truly superb luxury car. The front suspension differed in that the Imperial had sleeves and isolators to provide a quieter ride. The Imperial's sheet metal also differed in 1967-69, with the Imperial's sides being convex compared to the Chrysler's concave. Read somewhere the Chrysler's concave sheetmetal was difficult to produce. Cannot see how - if you looked at the back side of Imperial's convex metal, it looks concave. Bill Vancouver, BC ----- Original Message ----- From: <mopar48291@xxxxxxx> To: "Mailing list Imperial" <mailing-list@xxxxxxxxxxxxxxxx> Sent: Thursday, March 11, 2004 9:35 AM Subject: IML: 67-8 Imperial vs Chrysler > I just took a little tour of my backyard with tape measure in hand. Comparing the '68 Newport Custom to my '68 LeBaron measuring from the firewall at the brake booster mount to the radiator core support: > Imperial 40 5/8" > Chrysler 37 1/2" > So, that plus the floor pan bits further differentiates the Imperial from the Chrysler. For any who still think the "boxcars" are just retrimmed New Yorkers, I invite you to take a tour of the shop manual and see how little of the front suspension components interchange btwn Imperial and Chrysler. Imperial really did benefit from "Extra care in engineering". > Cheers, > Roger > > > >