Just walk the plug wires around: firing order is 18436572, move 1 to 2, 2 to 7, etc....the back the distributor down 45 degrees and you'll be at the same timing, but with more room to advance it. If you're running a Chevy, keep it around 36 degrees total...maybe a bit more without domed pistons cuz you don't have to chase the flame around the mountain, ....full advance at 3000 rpms should work well