Keep in mind I'm running an aluminum headed LT1 with a T56 so I'm much lighter than my original 403/auto combination. I also have 225lb mono leaf rear springs. So far the spring rate is fine. I've only street driven the car and am still getting the shocks dialed in but it's not jarring, bottoming out, or rubbing the fenders. We'll see how it goes when I start pushing it though. Swapping coil springs is easy so if I have to change then no big deal.
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Trey
Current ride: 2001 BMW 540iT soon to be manual swapped.
Former rides: 1979 Trans Am WS6: LT1/T56, Kore 3 C5/6 brakes, BMW 18in rims
00 BMW 540i/6: Suspension, wheels, and ACS bits.
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