I am thinking about upgrading to a 455. I have a 71 Cutlass Supreme convertible. I'm thinking about changing to UMI 2" lowering springs with new shocks. The car has a 350 in it now and it scrapes when it hits dips. I like the look of the car as it sits now, but I want to keep it from bottoming out every time I drive it. What's the best spring / shock combo for ride and appearance?
Thanks in advance!

 

I can't answer your question about the best springs, but I have seen many posts that the 455 is under 100 pounds heavier than the 350, and even less if you use an aluminum intake manifold. This means that the spring difference is not as great as you would imagine.

 

I talked with T.C. at BMR and he steered me in the right direction. It looks like it would be about 100lb difference though.

 

Aluminium heads and intake, eletric waterpump,maybe the pounds Will be less, and expensiver...:/


(yeah i know its a old tread) but anyway..