Chassis extending or shortening

[Gritineye]

When I was messing around building off road competition stuff the steering arms for LR 90, 110 & 127 were all the same part number.

 

[minimutly]

Building a front wheel drive Autograss car I spent hours trying to eliminate Ackerman - it was putting unnecassary loads on the inside CV joint - more angle on full lock than it wanted..

 

[bricol]

Correct ackerman, as opposed to the inverse ackerman it started with when I bought it, massively reduced understeer on my competition car.

Removing the as bought horrendous bump steer brought considerable improvement too - an inch of movement or more at the wheel rim either side of ride height – changing from an inch of toe in, to an inch of toe out from full droop to full bump

 

[minimutly]

Perhaps it would be helpful to explain - autograss is flat out dirt racing, 8 cars, first past the post wins.
I can't recall what type of competition car you drive @bricol ?