I'm in the process of rebuilding a 100-4 engine & the Dennis Welch auxillary rear Main Seal kit instructions say to drill an extra 3/8" dia. hole in the rear main cap @ 33 deg, that's simillary described by swiss, if main cap only has one. Instructions say this update brings it up to later cars.
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smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 