[HawgRyder]

Tim...I have been to that site before and the problem is the corrosion.
If the bores could be cleaned up oversize or re-bushed to original spec, then I would go ahead and do it myself.
The corrosion is where the galvanic action has taken place in the bore where the throttle plate touched (or was close to) the side wall.
The difference in metals created the problem, and the erosion is like having a trench dug around the edge of the plate.
In one of the bores this trench is over 2mm deep.
The thinking and designing continues.
Bob