Sounds like it may depend on the type of shock & rodend size used. Check also that the tower is on the right way around, just incase its a reversable design as such. Nothing wrong with using the little spacer/ shim things though, they dont look out of place and are pretty much designed for such occasions ( one of the small prices to pay sometimes when doing a custom build vs buying rtr ).
thanks for the fast reply man, always appreciated. anyhow yeah the shock tower is on correct, pushrod mounts are on the back of the shock tower. For shocks I got regular big bore's bolted up. But ya thinking a trip to the hardware store is in order, probably just use some spacers and a tad bit longer hardware as well.