Rear End Set-up on 72 Dart

BHB4408 · Nov 17, 2022

Any advice would be appreciated.

I'm building a 1972 Dodge Dart that will have a 525 - 550 HP 440 and 727 Transmission when it's completed. Frame ties and 8-point roll bar is done. It has Mini-Tubs and a Narrowed Rear End. It'll run 28 x 10.5 Slicks. I have the 002 and 003 Super Stock Leaf Springs that are moved inward, and an 8.75 Third Member (489 with a spool) that will be set up with 4:10 or 4:30 Gears. I have an adjustable Pinion Snubber too. I am targeting 11.25-11.50 quarter mile times to start, and hope to eventually get into the 10's. A Dana rear end will be a future addition when needed.

For now, can you please give me a starting set up on my rear end?

Does the 003 go on the driver's side?
What the Pinion Angle should be?
Adjustable Snubber Gap?
Use of Leaf Spring Clamps?

Any other advice is welcome. Thank you,

BHB

pittsburghracer · Nov 17, 2022

Kendog 170 · Nov 18, 2022

Can't help with your set up but you should easily hit those times. I have a similar set up in my 68 Dart 440/500 stroker around 550hp with 323 gears. This is a driver and pulled an 11.7 at nostalgia day. Found out later my secondaries weren't opening all the way.

crackedback · Nov 18, 2022

This is the way I remember which numbers go on which side.

The drivers of mopars are always odd... Odd number goes on driver side on US based cars.

If the springs are good and you use clamps on front segment, snubber can be a door stop.

Pinion angle is going to be a guess. Make sure when you are setting it up that the car is at full weight with drivers weight in seat. Most SS spring cars I've dealt with, anywhere from -4 to -8 on angle. Street driven at all, try to stay under -4. -5 and up tends to stress U joints.

Kendog 170 · Nov 18, 2022

Agree with above. If you install wrong, the left side of your car will be higher. Usually, the right side is higher with SS springs for launches.

Rocket · Nov 18, 2022

Visually the right side spring will have more individual spring segments, some of which are small and biased to the front of the spring.

Mopar Performance suspension book recommended their long shocks for more rear rise and about an inch of space between the snubber and the floor with the car on all 4 wheels.

RustyRatRod · Nov 18, 2022

You need to find a Mopar Performance Suspension Book. Ninth edition is the last one. They're not printing any more. So hit ebay and maybe put up a want ad here. That book has everything in it you could ever ask for.

JBurch · Nov 19, 2022

BHB4408 said:
Any advice would be appreciated.

I'm building a 1972 Dodge Dart that will have a 525 - 550 HP 440 and 727 Transmission when it's completed. Frame ties and 8-point roll bar is done. It has Mini-Tubs and a Narrowed Rear End. It'll run 28 x 10.5 Slicks. I have the 002 and 003 Super Stock Leaf Springs that are moved inward, and an 8.75 Third Member (489 with a spool) that will be set up with 4:10 or 4:30 Gears. I have an adjustable Pinion Snubber too. I am targeting 11.25-11.50 quarter mile times to start, and hope to eventually get into the 10's. A Dana rear end will be a future addition when needed.

For now, can you please give me a starting set up on my rear end?

Does the 003 go on the driver's side?
What the Pinion Angle should be?
Adjustable Snubber Gap?
Use of Leaf Spring Clamps?

Any other advice is welcome. Thank you,

BHB

What do you plan to run for shocks front and rear? They can be a make or break to your goal.