Exhaust swap from 4 door to 2 door...

Button said
Thanks MoparJoe, I probably could have "Googled" the info but I did actually think the 4 door had a longer wheelbase. I cleaned the plugs in the 4 door and added some oil and that alone made it quieter and smoother. I actually wish it didn't run so I wouldn't feel so bad about "gutting" the car. So now plans have changed quite a bit. We're going to take all the better parts from this car and place them into the 2 door, (dash, instruments, seats, pedals, emergency brake handle, etc). We'll tint the windoews black and paint the car black and white to resemble a Police car from 1970's. I want to find an era correct Police light bar. Then at car shows we'll set them so it appears one has pulled over the other.

MoparJoe is right on with wheelbases. The only difference you may want to address is that the tailpipe sticking out from under the bumper of the 74 would get crushed if the car bottomed out on a ramp. IMO a pair of turn-downs forward of the bumper would get the exhaust into the air stream and not have the same potential for being crushed.

FWIW the tailpipe length is the same for all. There is a difference between with and without tips. (Don't recommend running tips with the 74 for reasons stated earlier.) With the wheelbase difference, the exhaust pipe is also different.