[HWYSTR455]

Yeah, Coil Spring Specialties states they 'calibrate' the springs, which I don't think means what people think. I bet their' tolerance is still 10% or more.

Taller springs (free height) don't really change your pinion angle measurement, but it might change a little through the entire sweep of travel but shouldn't have a negative effect.

Longer shock stroke? That doesn't sound right either. But, if a spring is too tall, that could be. And suspect the wagon spring is just that, since it's the wrong application.

Like I mentioned before Global West does make 65-66 springs, I suggest calling them. They don't list everything on their' website, but the springs they use are <5% tolerance.

Classic Industries lists springs for the 65-66 B-Body (impala), and they list Global West springs, as well as a number of other manufacturers that make specific springs:

https://www.classicindustries.com/sh...coil%20springs

Here's the Global West listing they have for the B-Body:

https://www.globalwest.net/impala-19...uspension.html

I don't particularly trust Classic Industries, I have in the past gotten wrong parts from them, so I still suggest calling Global West.

If you get a 'stock height' rear spring, and do a 1.5-2" drop in the front, it should work out good. Again, I suggest calling.



.