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Yep, those are the ones I'm talking about. In 78 (maybe late 77) Gm changed from a 2 1/4 wide spring with 9/16 mounting bolts to a 2 1/2 wide spring with 7/16 mounting bolts. The Gymkana option still used the 2 1/4 spring but on the 2 1/2 cover. Those spacers filled the gap on the front and rear of the spring. They won't fit the 9/16 bolts.
The GM service cover for 63-77 is the 78-79 cover.
Mike
Yep, those are the ones I'm talking about. In 78 (maybe late 77) Gm changed from a 2 1/4 wide spring with 9/16 mounting bolts to a 2 1/2 wide spring with 7/16 mounting bolts. The Gymkana option still used the 2 1/4 spring but on the 2 1/2 cover. Those spacers filled the gap on the front and rear of the spring. They won't fit the 9/16 bolts.
The GM service cover for 63-77 is the 78-79 cover.
Mike
Thanks Mike.
By the way.... the shock mount went in easy as pie. Alternating tapping with tightening really did the job. I installed the shock as well just like you recommended. Granted....the hole might have been worn a bit from the first shock mount but still, I should have never went crazy with that sledge hammer like I did.