Why solid subframe bushings on both sides?

[First Bird]

The bushing between the body and the frame - I get. But what good does the bushing between the frame and the washer do?

The reason I ask is I'm putting a 1968 Firebird back together. In 1988 I put Moroso solid aluminum subframe bushings in, and loved 'em. But these are only between body and frame. They didn't make the "Outside" bushings. Now I see manufacturers do it differently. I'll change if someone can explain why.

[67zo6Camaro]

I may stand corrected, but I think the design is based on the original concept with the upper and lower part sandwitching between the frame and locking the bushing in place. This allows for some slight movement of the bolt that goes through the middle and allows a cushion motion.

However, I agree with you, that if the middle hard bushing (between frame and body) has a recessed edge that sits in the larger hole and does not move around, then the lower under side will only need a thick and large enough washer to cover the opposing radius of the above bushing.

Brett

[First Bird]

Thanks Brett.