https://www.gmheritagecenter.com/do...hevrolet-Trucks/1937-Chevrolet-Truck.pdfStock 1/2 ton without overloads have 8 front and rear.
I was down to six on mine, leave the two longest and remove every other one. Polish the spring surfaces and remove any steps from wear. Add Poly-liner between each leaf, it will ride better. Do not grease or oil the leaves, it will only last a short time. Poly-liner is available from most street rod shops. Or take your springs to your local spring shop and have teflon buttons added to each end.
The springs need to be able to slide, or it will ride terrible. Poly-liner is a thin teflon type material with short sides that lays the entire length of the leaf. It is stacked between each leaf to quite and smooth out the springs.
Also, the '37s were over sprung from the get go, meaning the rates were much higher then needed. The '41 and newer trucks used the same length and width, on a heavier truck, yet had about 1/2 the spring rate. The deflection rate is the spring weight. This means it takes 475 lbs of weight to compress the spring 1" on the front of a '37 1/2 ton . The '41 has same number of leaves, yet the rate is only 260 lbs per 1" compression. Rears are 200 for '37, 190 lb for '41 per 1" of compression.
I had custom spring mades for mine, rears are now 140 lb per 1" compression, fronts are 260 lbs per 1" compression. Ride is much better.
