Remember, carburetors are completely mechanical, ALL carburetor need to be tuned to your motor. PERIOD. No carburetor comes out of the box completely ready to run on all motors. And all carburetors require tinkering to keep them at their best performance. While the Street Demon may run good on one motor there's no guarantee it will run out of the box good on your motor.

The only guarantee is, if it's tuned to your motor it will run great. The same goes for the distributor.