73' B3 340 Duster pro touring build

I've got a question to all the experienced knowledgable members who are following this build.....I recently recieved a couple post on another site that has me a little concerned regarding the rear suspension.. please take a moment or two and read the posts and see if you think there accurate. I hate to be wrong setting this suspension up and have to correct it later when I can change things pretty easily now.

1) Looks like any articulation that the rear end will see (which will only be a couple degrees) will be absorbed by the bushing twisting and deforming which is exactly what they are designed for. It will reduce the noise and still allow movement which is good if thats what you want. If you want 0 deflection and perfect alignment at all times, then use rod ends.

Looking at the mounting locations of your lower links, the rear end of that car is going to squat down FAR when you hit the gas hard

2) No that is not a good thing for weight transfer. The rear end of your car will squat a little with a well designed system because of weight transfer. With what you have set up, the rear end will squat because of weight transfer and because of poor suspension geometry. Your lower links have the axle mounts quite a bit higher than the frame side mounts. When you take accelerate the link has large amounts of compression force transferring thru it. With the front mount being lower than the axle mount, this will cause some upward force on the axle mount (pushing the axle closer to the frame of the car) and the frame mount will be also forced down. If you leave the suspension and ride height where they are, you will more than likely use up all of your suspension travel and hit the bump stops just taking off hard

You are right that other suspensions have been designed in a similar way but they are not designed to ride as low as you are planning. Do you want to avoid this problem or are the brackets set in stone and you just really want that super low ride height?

There are 3 things you can do here if you want to correct this

1) raise the front lower control arm mount. This would be a huge pain in the butt because you would have to recess it up thru the frame rail so I do not recommend this

2) Lower the rear mount. build new brackets that will put the rear mount slightly lower than the front. This one is relatively easy and what i would recommend if you want to keep your ride height

3) Raise the ride height of the car. Move the axle further away from the frame rails which will change the ride height of the car but you will have more ground clearance under it and your suspension geometry will be much better.


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