I understand that, but hotrods with antique suspensions still have there draw backs..no matter what steering unit you have..I beleive that a vega unit , the mustang two unit and the cross steer unisteer will have some bumpsteer too as all do not pivot at the same points (tierod vrs "A" frame /straight axle)There will always be some sort of bump steer unless the system you use has the axle or A frame ,pivot from the same point as the tie rod pivots...the old straight axle racing design that pivoted in the middle of the axle inline with the tie rod was near perfect...but anything else..there will be some...i opt for this unit as I dont like the mustang units infront of the axle blocking its veiw...but thats just my opinion.