I read a thread that shows where to put the block heater. I removed the plug and there is no room to insert a typical heater. The picture on the forum shows a bolt on type of heater just above the oil filter but nothing is said about the type and model of the heater that will fit this configuration. It seems that an adapter is needed that will fit in the hole with an o-ring. I assume that is the heater screws into that adapter. If so what is the part number for that and does MF had that part? Thanks, Barry