Jim,
As you look at yours I expect you'll find the internal hole in the top and bottom billet pieces will be drilled for the dipstick wire as opposed to adding fluid. Mine were obviously a solid chunk of aluminum, so drilling them out wasn't a problem, but I did mine in stages as opposed to just hogging them out in one pass. Either would likely be OK.
The bigger win for me was discovering that the fill adapter had the hose on the wrong end.