The reason im sticking with an 8.50 cert is authenticity of the chassis. Besides I have a front engine dragster project 182" wheel base car with the SBC out of my c10 (900hp flywheel with a F1A94 the trucks getting a BBC 498 with a cross ram) that car I will be running a 6/71 on with injection and 20-30% nitro that will run lower et's then the Demon. I know the Demon will be capable of faster ET's but I will try not to kill the motor on every pass and run in the 8.60-8.90 range primarily. Plus I plan to travel quite a bit so altitude changes will just be a part of it.