Not sure if I'm posting this thread in the right place, but here it goes.
I have a decently built '72 Roadrunner, and am looking to put some Mopar Super Stock springs in the back. I have three choices though. 3,400 lb., 3,600 lb., and 3,800 lb. Does anyone have a guess on what the factory curb weight on these are? Currently with a 440, 727, and the obviously-lighter 8 3/4 rear.
Any help would be awesome. Thanks!
Super Stock Springs
Moderator: Site Administrators
- Diriccatiticka
- GTX (RS)
- Posts: 101
- Joined: Wed Apr 15, 2009 12:56 am
- My Cars: 1972 Plymouth Roadrunner
- Location: Indiana, USA
- Contact:
Super Stock Springs
'72 Road Runner
Currently Engineering New Setup!
Currently Engineering New Setup!

Re: Super Stock Springs
can't answer your question, but here's a bump and a welcome to the nest!
AKA Butterscotch71....the road runner nest is out to win you over this year!
- 72RoadRunnerGTX
- GTX (RS)
- Posts: 594
- Joined: Wed Dec 27, 2006 6:44 pm
- My Cars: 1972 Road Runner/GTX
1972 Satellite Sebring
1972 Satellite Sebring(big block parts car) - Location: Seattle, Washington
Re: Super Stock Springs
You did say best guess, should come in at closer to 3800lbs with the 440 in a stock configuration from the info I have.

-
- GTX (RS)
- Posts: 1394
- Joined: Tue Dec 27, 2005 10:22 pm
- My Cars: 1971 Plymouth Satellite Sebring
- Location: Colfax, IA
Re: Super Stock Springs
definitely go with the heavier weight springs...you're probably close to 3800 and maybe even a little over 

- Diriccatiticka
- GTX (RS)
- Posts: 101
- Joined: Wed Apr 15, 2009 12:56 am
- My Cars: 1972 Plymouth Roadrunner
- Location: Indiana, USA
- Contact:
Re: Super Stock Springs
Thanks for the welcome and the info, guys! I Google'd how much it weighed yesterday and couldn't find anything. It was originally a 400 car (not sure if that has anything to do with anything). I just needed a guesstimate as to what it weighed. The engine's been reworked, still cast iron block and heads, but aluminum intake, water pump and housing, and radiator. That's certainly not 200 pounds worth.
Just thinking out loud. I'll probably just go with the 3,800 lb. springs.
Thanks again!
Just thinking out loud. I'll probably just go with the 3,800 lb. springs.
Thanks again!
'72 Road Runner
Currently Engineering New Setup!
Currently Engineering New Setup!

Re: Super Stock Springs
Your car, depending on options and undercoating, is probably right around 4000. However, a low optioned small block car with no undercoating and removal of spare tire, carpet and a/c heat could come in around 3350.
If you have a truck stop or co-op nearby you could have it weighed, let us know.
If you have a truck stop or co-op nearby you could have it weighed, let us know.