Are the holes on the back of the block on my 36 flat head for an oil pressure sender or should that he for a beehive oil cleaner ?
They're for both, but most guys dont worry about the oil filter seeing as it's a byp*** system and very inefficient. Just change the oil every 500 - 1000 miles. I just use one port for the oil pressure gauge and block the other off.
The Jalopy Journal
