What are you guys using to remove this side head bolt that mounts the head to the cylinder? A 1/2" combination wrench has very little room to move the bolt and allows very little leverage. There are 4- 1 on each side of each head.

 

1/2" 12 point socket.

 

The bolt requiring a 12pt 1/2" tool was obvious, the question was for a recommendation of a better tool than a 1/2" combination wrench, and there wasn't enough height for a socket, let alone a ratchet to boot.
I splurged and bought ratcheting combination wrenches, problem solved.

 

1/2",3/8 drive socket on a 3/8 drive breaker bar

 

Yeah well,that'll teach me t never lend a tool out again. I unpacked my 1/2" drive set and used that since my neighbor hasn't returned my breaker bar.
Anyway, all done.

 

you want to use a 3/8 drive,1/2 drive may be too big