I used Energy Suspension urethane bushings throughout, too--including the rear spring pads and all shock bushings. My A-frame bushings squeak but the engine is not back in the car yet, and they will "settle in" after the car gets the full weight back on the front end and it's driven for a bit. Squeak or not, urethane beats rubber hands-down in my opinion because it won't dry-rot and eliminates virtually all the deflection that rubber bushings have even when new. The car will ride a bit more stiff, but Camaros never rode like a 98 Olds anyway. Unless it's a by-the-book restoration, I vote for urethane. My 2 cents.