11mm bosh pump questions

[ozonehostile]

shouldn't notice a difference in mpg unless your gov modded with a big turbo, and should just bolt straight on with no issues.
only thing that can happen with pump changes is timing issues as moving the pump even a couple of mm in either direction will effect the timing but luckily its not much of an issue to fix, if the timings out after the change, simply loosen the bolts holding it on slighty just enough the push the pump back to advance the timing, or pull it forward to retard the timing.

hope that helps