I have a 1970 olds 442 convertible. Front Has aluminum radiator, aluminum heads, aluminum intake. Also has a VintageAir A/c system. And Fiberglass hood with NO steel core. I’m guessing that all means front end is VERY light? I THINK front was stock or has a 1 inch drop.

right now the rear end almost drags in the wheels when I have passengers in the rear. I only see 3.5-four loops top to bottom of springs.

I’m looking for a Combo set of Stock Height springs, or numbers of some good springs.

I want to get rid of the floaty feeling and my Tubular headers bottoming out when I go over bumps. Right now it sits too low in back and I think the front springs are shot.

im using KYB Shocks all around.

anyone have some numbers or real world examples? I want Stock height. No drop.

also I have Tubular control arms and Taller spindles. If that changes anything

 

My '72 ragtop has iron heads but I do have an aluminum rad and intake, along with the Thornton shorty headers.

5536 (Moog p/n) are stock height small block springs, albeit I presume you have a big block - others will likely opine but given the weight loss in your front end, these may work.

Moog 5379 is a stock height rear spring (again I have a 350 but these may also work for yours. If you wanted a slight lift in the rear, I can recommend the 6435 springs (Moog discontinued them but Mevotech makes them currently so you can compare specs between them and any others you may be interested in)

 

Call Eaton -Detroit springs. They can help with what spring you may want based on weight, etc.

 

Update!!

I went with UMI springs. They had a Christmas sale that lasted into New Years. I went with Stock rear height and 1 inch drop in the front. Based on their recommendation and the reduced weight in my front end with the items i listed above.

This weekend, I did the rears. INSTANT improvement. I had not realized how saggy my rear end was. The springs I took out looks the same height as the UMI ones but once installed compressed more. The UMI ones are night and day. I can actually see my Differential and gas tank under the car from the rear?!! Totally changed how it drove and how it handled even the slightest ramp or grade and turning is no longer like rolling off a cliff.

The fronts are next, but I expect that they will be stock height when installed and continue to improve handling.

 

I'm a little late to the game to suggest UMI - good choice, IMO.

Here's my 1971 CS convertible suspension rebuild w/ all part numbers & pictures (iron intake manifold, iron exhaust manifolds SBO - e.g. stock).

Winter Project - '71 CS Suspension