Is wheelbase on 68' Roadrunner vs 68' Coronet same?

IIRC the Plymouth WB is slightly shorter (1"?) and it was basically the location of the axle on the leaf springs......not really anything significant; only enough to cause headaches to us restorers 40 years in the future!

Dave

Chargervert I've had vert trim in different lengths & vert glas that was 1" short... To be honest I don't know the source, it was brought to me as 68 Plymouth vert.. All I really know is it didn't fit & I wasted allot of time trying to make the glass fit... The trim I knew was wrong pretty quick but the glass I spent hours fighting...

Both the convertible Coronet and Satellites have the same undercarrage structures as the hardtops. They use all the same frame rails,floor pans,the peice under the rear seat,the trunk floor pans,and the inner wheel houses. The only difference is that on convertibles,they added torque boxes front and rear like on Hemi b bodies,and there are stiffining braces inside the rocker panels. other than that the only other difference is that they cut the tops of the wheel housings off and capped them with a flat panel to make room for the retracting roof. I have cut apart a few of each to turn them into Chargers. As far as I know I have never heard of any difference in the rear glass. I have never seen anyone selling B body convertible glass as Plymouth or Dodge specific. I can measure the plymouth glass,but I don't have a Dodge on hand to do so. As far as I know they are the same. Maybe someone sold you some 66/67 peices they are different. the 66/67 vert trim also looks the same,but is different lenghts.

The quarter panel interior metal garnish is different too; Dodge is longer than Plymouth. Ran into that back in the '80s.

The convertibles use the same top frame,bolted in the same location,with the same dutchman panel. The doors and door glass are the same,so I seriously doubt there is any difference in the quarter glass between the 68-70 Dodge and Plymouth verts. Even on the e bodies verts where the floor pan under the rear seat has a two inch difference,uses the same glass and top frame for both Plymouth and Dodge,the difference is in the Dutchman panel on those cars. There is definately no difference in the length of the quarter glass on the hardtops, I have about 50 peices from both Dodges and Plymouths,they are the exact same,all 68-70 B body hardtop glass interchanges except for the Chargers rear window,thats is different for the tunnel back window and the 69 Daytona and 500 use a different window also. The Superbird also uses a different rear window than the standard 68-70 Dodge and Plymouth.

1968 Road Runner 116" wb VS. 1968 Super Bee & Charger 117" wb * 1" difference

RR with 8-3/4" has 51-1/2" driveshaft VS. SB/C with 8-3/4" has 52-1/32" driveshaft * 17/32" (.531") difference
RR with DANA has 50-3/8" driveshaft VS. SB/C with DANA has 50-31/32" driveshaft * 19/32" (.594") difference

Glass for 2 door 1968 b-bodies

front - hardtop & coupe VS. convertible
door - hardtop VS. coupe VS. convertible
vent - hardtop & coupe VS. convertible
1/4 - hardtop VS. (W) SB coupe VS. (R) RR coupe VS. convertible
rear - hardtop & coupe VS. convertible VS. Charger

Thats what I thought. It makes sense that the popout windows on the post coupes are specific,as they fit into the openings with a frame and gasket,and the rear quarter panels are shaped different. All the other side glass is the same on the hardtops. The convertibles side glass is also the same for Dodge and Plymouth. It is possible that the Plymouth rear quarter convertible glass that one wild R/T tried to fit in the B body vert that came up an inch short may have come from a 67-69 Barracuda convertible,as it looks almost the same as the B body peices.

Plymouth = 116", Dodge = 117".

There is one other piece of unibody thats different.....the rear leaf spring hanger box.The rear shackle pivot point is moved forward on the Plymouth box.

There are 2 different length spring hangars as stated , my 69 bee had one of each and a spacer added between the shorter one and the spring box .