The Edelbrock #8901 Choke Block-Off For?Small Block Chevrolet With #2101 #2104 #3701 Intake Manifolds. For 2007 we added a new Super Flow SF902 engine dyno. For real-world tuning there's our Super Flow model SF-840 eddy-current chassis dyno that can handle up to 1 000 hp at the wheels and speeds of 200 mph.