I got my SD8 alternator and tried to mount it up on the vacant vacuum pump pad on my IO360 tonight, and ran into a problem. The adaptor currently on the vacuum pump pad is (as close as I can measure it) 1 3/8" deep, and the SD8 will not seat fully on it, it appears that the adaptor need to be about 1 1/2" deep. Does this adaptor come in various thicknesses? I have been unable to find what I'm looking for online, and I have confirmed that the gear is indeed fully seated (the adaptor block itself would stand proud if it wasn't) and the adaptor block is firm against the engine block. Here is a pic showing how it fits up, the gap is right at 1/8".
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