I have SS spring with traction bars and a 2800 stall converter and the snubber hit really hard too.
A few problems I see here; if you indeed have SS springs, they lift the car on accelleration and create such a gap in body seperation that there is no way a snubber would be slamming in to the tunnel. If your using traction bars and a snubber, they are almost counter acting each other. Your spring may be new, but based on the above conditions, I'd almost bet they are an XHD set and not an SS set. Mixing these two up is a common mistake made by any number of builders.
Can you verify the spring part numbers or what the front hanger looks like? SS springs require a special, 2" longer hanger that has multiple mounting holes.
I'd also wonder about what shocsk are under it if you do indeed have SS springs. The SS springs lift the car a fair amount and the stock shocks will top out and not have the travel to allow the springs to properly hook and will cause them to unload when you hit the gas.
I still think tires may be an issue as well. While you have a 275, what brand? If it is a hard street tire like a BFG, then yeah, a 318 can spin those without too much trouble so a 440 will annilihate them. Are they pumped up to 35# or more? A move to a softer compound may be required if you want to hook on the street.
Which also brings up the point of track usage. Typically tracks are prepared much better than any intersection stop light, so hooking at the track tends to be less of an issue. Until you can get to the track and launch it in the groove, comparing it to street performance is apples and oranges.
