need 3/10th

I am assuming you have a 2.44 first gear not a 1.44, which gives you to high of a starting line ratio. A 2.66 would be better, a 3.09 would be best, but I guess in Switzerland these gear sets would be harder to come by. I fined on my stick car that lower shock setting give better 60 foot times( automatics like stiffer), on your QA1 shocks this would be between 3 and 5 clicks from full louse, set the Cal Tracs at zero preload with you in drivers seat or some one equal to your weight, let the rear suspension work. You have to endues some clutch slip into the equation, either by you regulating with your foot( which tacks a lot of practice) or go here read thoroughly and call then purchase ClutchTamer.com. This is the best bet for a dedicated street car that you do not wont to run a Softloc style clutch(adjustable slipper clutch) for best 60 foots and clutch control. I still prefer the SoftLoc clutch but less than $200 for the ClutchTamer compared to $2500 for a SoftLoc(which is not real street friendly) works a lot better for most guys and there street cars. One more suggestion, on your next set of slicks get a dedicated set of stick car slicks with the stiffer side wall, you wont tear the side wall out of them and you will have more control at the top end. If it was my car I would put the CalTracs mono leaf springs on the back and only snug the spring eye bolts with lock nuts do not over tighten, free up the rear suspension from any bind.