mine handles well on standard shocks, like a gokart! speed bumps arnt so fun lol
I woulnd't ever just use springs though IMO its stupid waste of time do it right or not at all. Since there no decinet shocks ou there keep with the stock ones after all if all you want is lowering springs on the cheap ride etc arn't top of the owners lists often.I would edde, 60mm on a 1.2 it'll handle like a bag of nails without the shorter shocks. Been there before.
How much are they asking fella?