How do you get a Suspension to hook, when the track surface is marginal at best

"Summit racing' for the SS Springs and the back brace.
"Doctor Diff" for clutch packs, spring relocation kit and axle perches.

Did you notice that one spring pack has wear pad on it and the other does not??????

Descriptions says right side has 8 leafs with the last two facing forward only...and it does.
left side has 6 leafs...and it does.
They have the right part numbers
Not going to stress too much over it, but it is odd....