Can you post a pic or short vid of the issue? I'm not sure of the problem you have here. I've seen something similar on a brand new nostalgia F/C. It was backing up to make a test pass when both front wheels turned out (left to left and right to right, like this -> \ ^ / ). IIRC when going backwards both wheels want to turn outwards and on the steering linkages / tie bars, they were going past / over "TDC" on the linkage, for want of a better phrase. Has it always done it?
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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