The last prototype had some kickup and some adjustability... I was adviced to minimize the kickup on the car. It added traction - I recall primarily forward traction, but I'd have to look back in the notes I made and things I wrote in this topic
This - and for the gearbox/donor car that I chose - the front of the car has 0 kickup. It can (probably) be adjusted with the RDRP Low Roll Center suspension hangers, but that's something to test when I know more about what's on the car right now.
Anti-squat is a whole different matter on this car. To begin with the rear end doesn't even use double wishbone suspension but trailing arms. I guess anti-squat here would be achieved by moving the hinging point of the rear arms up. I will try this out soon to see if this is indeed true

At the front, the kickup forms anti-squat, and this may well be the reason that reducing kickup works to maintain grip on the front on acceleration (because when the weight shifts to the rear you don't pull it out of the front suspension as much.
Caster is quite minimal (standard DEX setting) - I can increase the caster, and it's worth trying out... but then it may be good to ask first who I could borrow a set from - it's so much cheaper

I can always still buy them when they work.