Rear spring question

[twosnvrlose]

Is there two lengths or rear spring on the 1969-72 blazer 52" and 56" right?
What is the proper way to measure the rear springs a strait line eye to eye or follow the curve of the spring? do you have to remove it from the truck? or does it just need the tension off?

 

[dremu]

Pretty sure that 73-91 Blazers are all 52", and the 56"s only came on *some* 3/4's and 1-tons.

I do NOT know about 1st gen (67/69-72) trucks.

You measure along the arch, eye to eye, and it's not exact, so you can do it on the truck loaded.

-- A