13. We didn’t encounter any drama bolting on the new throttle body to the stock GM manifold. In fact, the Lokar throttle linkage assembly didn’t even need any adjustments—it just went right on. We were able to reuse our existing -6 inlet fuel line at the front of the throttle body. The unit features an internal fuel rail so you can use the front or rear for either the feed or return. We fed into the front and used the rear for the return.