[DSG2003Mach1]

i thought the melling pump might but I wasnt 100%.

The timing dowel is basically a pivot point for the guide. The part that threads into the block is much smaller than the pivot point the guide sits on. When they fail its usually the block side so they drill and tap a bigger hole in the block to use a dowel with a larger diameter threaded side. At the proposed power level it sounds like youd be fine but again to do it later would be a real *****. If it does fail its probably taking the whole motor with it.

If they have to do more than hone it I would still suggest the absolute minimum bore increase to clean it up. Make sure they do the machine work first and THEN order pistons. It doesnt sound like you'll be pushing that hard now but why create problems later when big power would only be a blower swap away.