Dear Welder Series…
I just got a 1939 Plymouth pickup. I want to lower it, and I’m looking at the 4 link for the rear. It has a Ford 9″ rear axle. Also looking at maybe a Mustang II front. Can you help me maybe you have something that will work. It sits way too high and I’m going to box in the frame after I’m done. Thanks, Tom.

Dear Tom…
Hi, Tom. Any one of our rear 4-link kits could be used with your Plymouth. If you use a parallel kit, be sure to get a Panhard kit, too.

Check the track width (the distance from the center of one tire to the center of the opposite tire) to help decide which Mustang II kit to use. The frame width, inside and outside, will also help in choosing the Mustang II track width to get.

Here are some links for products that might work:
Rear suspension

Rear panhard kits

Click on any one of the kits for a more detailed description. This will probably generate more questions. Please send them to me and I’ll try to help.