I've had the bottle before in a hb w/ a mild LS engine. I sprayed a 65 shot, I do know wha tI doing as far as reliability but my concern is at 8500 rpms and a 55 shot of juice might be a little much for the bottom end. Rings are in good shape, I'm going to a dyno in Feb to get the car tuned so I can make the most out of my bottle and engine.