Okay, I received the parts from Summit today and here are the results of my findings:
The isolators on the left are the Energy Suspension
#9.6102G and these are the GM general fit. They are a match for the front springs. It seems the front suspension on our cars has enough in common with other GM models. The tubes on the left are included and can be used on the pigtail end of the spring that sits in the A-arm. Summit price is
$25 for the complete kit
The small isolator on the right is the ES
#3.6108G. This is also the GM general fit. These
DO NOT work for the top of the rear springs in our cars. I forgot to factor in when ordering that most GM cars with rear coil springs have both ends tapered. Unlike our springs which are tapered on the bottom only. However, these are useable for the axle end of the springs should anyone have a desire to do so. For that, they are a fit. Summit price is
$5 a pair.
The
#9.6108 are probably a better fit for the top of the rear springs based on the specs from the ES web site. Keep in mind though that these are thinner than the factory isolators and could affect ride height a small amount. They also may not fit tightly around the post in the body and this could allow the rear springs to shift. IMHO, the factory isolators are best for the rear.
