lowell,
the engine block housing output goes through the filter, out the other side, elbowed & staight to the cooler,then goes back to input side of block housing.the temp sender is on the other input side of the filter housing,so it's getting a reading before the
oil is cooled & before it goes through the filter.the plugs are as follows on the filter - one on second intake port (temp guage) & one on output.hope this helps,this is the way it was done by dennis althoff.
tim