On a conventional headed BBC I had very good results with having the nozzles close to the flange and pointed toward the head of the intake vavle with the nozzles recessed so that it did not protrude into the intake port.
Some have the nozzles perpendicular to the port but to me this does not make sense, call me crazy but it seems that ramming a large quantity of gas at 900lbs down the intake port might help to improve flow.