does anyone know the stock spring rates or MOOG p/n's for a typical hd suspension optioned caprice?
i am looking at getting a weight jack suspension and racing springs but have no idea where to start with rates.
thanks

Based on my bad experience today with this same exact issue, heavy duty moog springs for the front have the product #5428. The springs for the rear are #5419. These apply to 4 door sedan with A/C. I know this because i had the unfortunate experience of having some front springs placed in the rear. I posted a thread about this. any help onm that would be appreciated.

thanks

any other ideas out there?
c'mon, where are all the big guys that are always on here.
i know i havent been here in ages, but hey.

are you sure about those pn's?
the info i have from moog says that the front springs you listed have a rate of 393 lb/in
thats quite low considering the rears are 173 lb/in.


as a comparison, my camaro has moog 5662 fronts which are 707 lb/in rate
the rears are in the 150 lb/in range, but i cannot remember the pn's off the top of my head.

http://bbb-carb.com/moog_Coil_Springs.htm
this is the chart i am using.
and yes, the 5662 and 5664 is incorrect in the chart.
switch the rates for those two.
the 5664 has a heavier wire diameter.

K584s for the front. I used them on my 89 9c1.

Several others have used them when doing big-block swaps to even out the ride height.

K584s for the front. I used them on my 89 9c1.

Several others have used them when doing big-block swaps to even out the ride height.
you mean moog 584?
that looks way too long. the free height is 16 inches.
edit, nvm, the stockers are 16" long too