The bottom line is no one really knows where the best location is except those with the exact same setup and have done experiments to determine where the average airflow is sensed in the most critical operation of the engine. Mine is toward the back side and seems to work just fine but it hasn't had a tune or been on a dyno. I'm coming up on 3,000 miles and haven't had a bit of trouble with the performance of the engine while averaging about 18 mpg with 3.55 rear gears and the .64 fifth gear.