Front coil over spring rate?

Hello y’all
I am trying to get some weight and adjustability in the front of my B Body drag car. I hope this group can help me.
I have Magnum Force Upper control arms and HDK bolt on upper coil over mounts.
I have lots of shocks set up for coil over mounts from my dirt track days and I want to use those if possible. Easy ups, hold downs, 50-50, etc...I have the QA1 shock specs from HDK so I’m good as far as compressed/ extended lengths so I’m good there, but I do not think 3 in travel is enough for what I want to do. What I I need help/ advise with is a beginning spring rating. I want to know what spring I need to get stock ride height.
Does anyone know a starting weight rating, or a usable calculator? I have done a google search for a conversion calculation but evidently I am not smart enough to use them.

My thoughts are to remove the torsion bars and use the shocks/ coil overs to tune the front rise/ fall rates without changing ride heights. It’s worth a try I think.

Thanks in advance.

I'm not sure on a chart. I have an HDK k member with Summit brand coil overs. I went with the recommended 450# springs. It's great on the street. I spoke with Denny not to long ago. He recommended 300# springs for my Dart. I haven't put them on yet though. I would give Denny a call and see what he says.

Thank you! What part number Summit Coil over?

What does your front weigh?

Ive #350 on my a body coil over car, #300 was a no go if you still drive on the street and have a pan or trans pan within 2 inches of the road.

It’s a full body with fiberglass hood, fenders, and bumper but it still has the inner fenders. I don’t think it’s lost over 100 lbs. 350 bottoms out so the 450 May be the way to go?
Thank you

I would go with the softest spring that won't coil bind at any part of travel. Then control the rate of rise or compression with shocks.

I run 450 on my Cuda with a MF kit....I switched to Viking shocks with longer extension to allow more travel.

Mine are part number SUM-G773601


I'm an A body though

Thanks for the heads up on this. I have 300# waiting in my garage to put on. Is weight transfer better with the 350#'s

The heavier the spring, the stiffer the suspension. Lower pressure springs will give you quicker weight transfer, but will bottom out faster when street driving.

Exactly...The spring has to be compressed to store the energy...

True. Lighter springs will have to be compressed more to support a given amount of weight at a given ride height. This makes the suspension more "lively", stores energy in the spring and helps with separation. A good DA shock is needed to control the suspension when going this route, front or rear.

Thanx for the assistance..