The Lycoming 360 engine is a bit of a disaster, at 70 hours a year it will not make TBO needs 40 hours a month. The camshaft will rust out first, does need the roller follower option and it will suffer with sticking valves. Then there is the Wrist pin centering aluminium blanks that roll and damage the piston and cylinders.
Then there are the overheating problems which can aneal the oil control rings causing them to roll over and break. Plus uneven cylinder wear due to shaving off the cooling fins down one side of the cylinders.
Finally according to Lycoming any problems with their engines is down to the operator not their lousy design, yer right.