I know very little about suspensions and need some input.

I have a 67 coupe that has undergone 8 cyl conversion (289,8" rear, discs up front, 15" 5 lugwheels) and put some 15" 245/60s on 8 inch rims in rear, and 15" 215/60s on 7 inch rims up front. Oh, put in new KYB non performance shocks all around. The car drives fine UNTIL I have 4 (2 front 2 rear)passengerswhenthe wheels are constanty rubbing and bottoming out. It sounds really bad and embarassing when Iput more than 1` o2 friends in for a test spin.

What are the solutions? I have thought about going to 5 leaf springs but not sure that is the best thing to do and really haven't come up with any other ideas. I like the wheels and have put too much money in them to swap them to a smaller size.

Many Thanks inAdvance.

 

if they are the orig. leafs, im not surprised at all. they do sag over time. i think some stock replacement ones from mustangs unlimited, or any of the vendors would work fine. or if you want you could get some 4 1/2 leafs 5's or what ever you want. good luck!

Paul

 

Go with 5 leafs and rake that rearend! Just kidding, unless you like the rake look, but I agree with racin66 new leafs are the way to go I used to have the same issue..

 

Did you change the rim size?.........im sure its the leaf spring as mentioned.

 

sorry not to high jack but what is rakeing the rearend?

 

If the car has a "rake" it will sit higher in the rear. Old school look but I like it. I had the same issue and put 5 leafs on mine. It sits a little higher but now I can carry 3 in the back. It is a little stiffer ride however.

 

Tarafied hit the nail on the head, it was actually a huge thing to raise the rear end... I like the look and it drastically decreases the chance for bottoming out. With the old leafs as soon as I would punch it the tires would start grinding, it actually toar rubber off the rear.

My car is raked by somes standards but, some get ridiculous I will post a picture of my uncles car tomorrow, it is too high IMO

 

Personally I liked the raked look on '67 and up Mustangs. Thinking about doing this on mine with tire size instead of the leafs. Get the rake with out the harsh road.

 

Have you considered air shocks? I use them and can add a little air if someone rides in the back seat. I can jack the rear up, like we did when I was a kid, or I can level it out. One of the first things I did, back in the 70's, was to start using air shocks on the rear of my Mustang.
Dan

 

Most people argue against air shocks but if you get a decent pair they are fine especially if your not building a track car.... which most of us are not... i use a pair to just cart around town in my stang (daily driver) and it drives fine for the most part... air it up when im carrying a few of my buddies or just want the cars big ol' butt in the air., but i dont really race the stang, thats what my charger is for.