I run both extended arm and bar at the track,stock cylinder +6 is a good length and you can still get your ass over the axle,my bar is 95% of my wheel base,with the rite tire and arm angle you will have no problem hooking as a matter of fact i need the bar,drag racing is about being consistant enouph to know when slight improvements in set up and power change ET.So anything that help you get down the same way each time is a go in my book.With the rite clutch set up an tranny you can get it to work with no bar but my slips show huge jumps in 60ft times with the bar.Dont worry we are still street racing in Long island and hitting the track trying to keep it alive over here