The head bolts only hold the oil filter bracket on the engine, not the aluminum filter housing. Remove the filter housing by removing the clamp and line fittings.

Bill: Not exactly sure I understand what you are referring to about the oil filter bracket. I have two "G's" and they both have the spin on filters that screw onto the filter base. There is no bracket or anything attached to the head?? The filter base is a friction fit into the block. I maintain seven "G's" in our shop here on the farm and all of them that have filters are the same. Not all "G's" were equipped with filters. Maybe you have one that was not factory equipped and has an after market add on or maybe the "G" had more then one stile of filter. But all of the ones I have seen and worked on had the fiction fit filter base and they are removed by carefully prying them up and out or driving them out from inside the crankcase. I hope this helps.

We have a "G" and a Pony with the same engine, you are correct about the "G" oil filter. I described the oil filter bracket for the Pony and will use my "OLD AGE" as an excuse! :-( The head bolts broke off while removing the oil filter bracket on the Pony. Thanks for the correction.