Assuming the top hats are the same as I got from Ben at BG then they should fit nicely but they are sized to be a "snug" fit in the brackets unlike the standard shocks that if anything are undersized for the mounting brackets.
Bear with me on this; on my chassis (and the previous two chassis!) the top mount brackets for the front shocks are shared with the wishbone mounts and are actually slightly wider apart than the length of the wishbone bush inner tube which in turn is longer than the inner tube of the shock bush. What this means is that the brackets as standard are squeezed in substantially out of parallel and while they grip the wishbone bush adequately they have a very poor grip on the shock leading to movement and fretting in the bush and on the mounting bolt. Well before getting the Ohlins shocks I had fitted spacers to effectively increase the length of the bush and had straightened the brackets towards parallel. What this means is that you will very likely have to spread the brackets open a bit in order to get the top mounts complete with their top hats into the chassis brackets. I did this with a longish set screw plus some washers and a couple of plain nuts, a bit of care being required to not over do it. Only takes a few minutes. the bottom mount on to the wishbone just fitted.
At the back on the right hand side you might have to do something similar on the swing arm brackets as, again, they are further apart than they should be so are likely to be a bit squeezed in. On the left hand (drive belt) side it's the same story plus you need to fit unequal top hats to space the shock a few millimetres over away from the belt.
Chances are your shocks will be set to a perfectly acceptable starting point out of the box but I'll try to have a look at mine tomorrow to see what I've got them set to (I should have it written down but...)
