i'm having tire spin issues out about to 60ft. (aprox) i'm experencing a chatter feel and not quit sure what to do. i have a 69 dart with ladder bar rear and penske d/a rears, the front is torsion bars that came with the 318 model. upper arms are heim and heim strut bars with the calvert 90/10's. besides any sugestions i have a hunch that when the front shocks top out that it may be disturbing the rear since the calverts extend so quickly. if one is to go to the d/a front shocks, would you want to set them at to pull apart slowly and not let them reach the full extension during the launch. the car has brand new 11.00 x 29.00" hoosiers set at 12lbs. the engine is a 528 wedge mated to a glide. i leave off a button at 4000 and then flashes to 5600 rpm. i'm sure there may be more info needed and i will reply as ness. thanks.

Video is the best way to check things out... how much
front end travel... also you might want lighter T-
bars to give you some more push upwards for a longer
travel... if you thing it tops out on the upper arm
bumpers cut them down to about 1/2" .... what rear
shock settings are you using

whats your tire pressure?

Where do you have your ladder bars set on the front heim joint mounts, upper, lower, center or hole?If it is shaking(shuttering) the tires try pumping them up a half to one full pound

60 ft is about were you put the front wheels down i was shocked you got down the track you were one of the few with a small tire see u at mooneyes

I have my ladder bars in the lowest hole in the front mount and have treid from no clicks(full soft) on both settings to 4 clicks stiffer on both settings on my Strange double adjustable rear shocks, Koni SPA in front with six cylinder torsion bars. I have ran both bias ply and radials on the car, 727 with a low (2.77to 1 ratio)low gear set, 8 inch T/A race SS Hemi converter (not built for my car ) with 4.10 rear gears foot braking, 1.39 60 ft times best so far on a good track M/T Et Street 13.50x30x15 on twelve inch wide rims.

How wide are your rims for the 11" tire... where is
the front ladder bar at(angled down?) and what is
your 60' now