[Overdriven]

I’m with Scotti, the rail system is nice solution with only one thing to locate and mount per side with the added benefit of adding a bit of bracing. Even if it’s 100-150lbs (generous approximation) heavier than other weld in solutions the weight is down low on the frame just in front of the axle where it helps more than it hurts handling. You could probably save around 20lbs in hardware if you welded in the rails and you’d have a lot less holes to drill!

I don’t see unsprung weight being an issue, the mounts at the axle pads are heavily scalloped/windowed and drilled. The worst offender in the unsprung weight category is the torque arm mount with its integrated diff cover that is obviously heavier than a stock stamped piece.

The price is the main detractor with other less expensive solutions available. But if you take a look at similar suspension designs (bolt in or weld in) for 1st gen Camaros and other vehicles, the price doesn’t seem that out of line.