Mopar Suspension Upgrades, How to Choose! 

Thanks for the suspension options. Glad to see you favor the stock style suspension.

I might be fulfilling my dream of getting a 1970-1974 Barracuda. Your video is certainly a guide to return to.

I have a TVS ON MY '66 Barracuda, a Mosser rear end, B-Body rear leaf springs. It handles really well. I run Auto-Cross with it, usually the only A-Body there.

You did a great job reviewing the options out there and all are very expensive, I was assembling my suspension last night and I am going with the PST 1.03 torsion bars, and their lower control arm stiffening plates, I also use all of the polygraphite bushings which sometime end up being pretty noisy despite the the silicon grease that they provide. In this car I am running a firm feel stage 2 power steering box as well. Steer and Gear also make a similar steering box in varying degrees of road feedback. I bought one of their units when another firm feel box failed and they would not warranty it. I have also installed the US Tool sub frame connectors and torque boxes, they are really an improvement that is very noticeable especially in my B-body convertible. I am installing a 6.4 Hemi with the 8HP70 automatic in that car. Most of the parts I have bought for that conversion are from Holly. I am seriously interested in the QA1 system and I guess time will tell if I can pull that off or not. Thanks again for highlighting what is out there in one well done post. I

I decided to go with the ENTIRE QA1 front suspension including the K-member, but I am using SPC UCAs for the additional adjustment range. EVERY coilover conversion is expensive, and I'm setting up for street/drag race. Carl GERST is the designer who brought the coilover front suspension to QA1. They are working together now.

Good morning. Just watched your video. Nice comparison of all the Mopar suspension systems and k members. I also subscribed. Thanks for sharing. Take care, EM. Also, I am doing the US Car Tool right now in a '68 Dart. Purchased the whole package. Perfect for my rotisserie build. Nice package.

Adding the rear sway bar along with polyurethane bushings completely transformed the car for me. It's so fun sliding the car around corners with the accelerator pedal. I think what would benefit me the most at this point would be modern wheels and tires. I completely rebuilt the suspension, and I have only driven about 10,000 miles since then, but it's been thirty years!

Thank you.

Nice variety of packages.

Awesome video very informative! Great to have several options for each persons build. For me, debating on the 5 leaf or 6 leaf for my 70 Challenger.

Firmfeel makes the torsion bars in-house and they race what they sell

I have a '68 Barracuda fastback here. Why the heck would I want to go away from my torsion bars, which keep my cg low, towards the centerline of the car, and more rearwards compared to the coilovers? I can always swap out my 0.820" torsion bars for my 1.06" torsion bars, and reattach the front sway bar if I want to drive more than 1/4 mile at a time. Also, the QA1 coil over kit is set up with power steering, I don't do that. Why do I want to step away from my 002/003 super stock springs? They *work.* Good video, but it has not sold me on the new technologies. If you can show solid data, X part changed out gave me 0.1 improvement in my 1/4 mile, or Y part changed out gave me more consistent 60 times, that would be very helpful.

Here in New Zealand there is a former race driver by the name of Leo Leonard ' who raced the Valiant Chargers here and in Australia in the early 1970's . To get the Charger to be a good racer he did a lot of experimentation and development ' especially as far as handling was concerned ' his setup as I recall was a sway bar on the front but not the rear ' rubber bushings and not nolathane ' good shocks ' and perhaps the most interesting thing was that he came up with his own wheel alignment settings that worked very well on the track ' he also came up with a good wheel alignment setting for street Chargers ' or in fact any Valiant ' I had my Valiants alignment set to his street recommendation and it made a huge difference to the quality of the steering and stability ' I'd say his settings would most likely apply to any mopar of that era . Those settings are in the book "Hey Charger" by Gavin Farmer . If you cant get hold of the book 'I've got the specs written down in my service manual. Just ask.

@backyardhotrods What are your thoughts on the magnum force transformer handling kit for B body charger?

There are very little mods to do to put the RMS Street lynx rear suspension in. It’s a fairly straightforward install actually.

Anyone wondering, the RMS kits is pretty much 100% bolt in. Only welding is a couple brackets on the rear. I'm installing this kit now. No offense but this video is a little misleading.

All great but nothing for the C-body.

The coil over setups offer ZERO advantage over a well sorted torsion bar based suspension. They cost too much, they aren't as durable, the geometry is not better and you still need brakes!

Great info thanks for putting that together