Need help pulling rocker arms on 1986 B2000

I have a 1986 B2000 that's been smoking badly at startup lately. I did a compression test and that came out fine, so I figured it's probably the valve seals.

To replace the seals, I started by loosening the 10 bolts that hold down the rocker arm assembly. I then discovered that there's an 11th bolt behind the cam sprocket! I wouldn't mind pulling the whole timing belt so I could remove that sprocket and pull the bolt, but I can't get the darn crankshaft pulley's bolt to break free.

In another thread on this forum, I saw someone do this: http://i.imgur.com/fN2aSvV.jpg where he apparently slipped the timing belt off the upper sprocket so he could remove it and pull the rocker arms. Would it work if I slipped the belt off, remove the sprocket, removed that 11th bolt, pulled the rocker arms, then re-installed the sprocket & timing belt so I can hand-turn the engine while I replace valve seals?

Any other hints or tricks are appreciated, I'd like to avoid using a breaker bar + the starter to break free the crankshaft pulley but as a last resort I could do it.

No, you do NOT need to remove the big 21mm crankshaft pulley bolt to get the timing belt off !!! There are six small bolts you remove, takes a 10mm socket; I've used a 1/4 inch drive ratchet for those. See http://www.mazdatrucking.com/B2200//B2200_Timing_Belt.html
http://www.mazdatrucking.com/B2200/B22TimeCheck.html

My B2200 had nice compression but still smoked, at 183K miles I had the head re-done and I installed new pistons, rings, and connecting rod bearings, all without pulling the engine. I'm at 207K now.

Awesome! I'll get back out there and take another look, I couldn't see the small bolts from up above. Thanks!

Yep, that did the trick, thanks again! Got those 6 bolts out no problem.

Now I'm trying to figure out how the heck you maneuver the timing belt cover out from behind the fan bracket; it's got a bulge over the water pump that makes it really challenging.

I can't remember for sure, but think that I removed the fan shroud and radiator when I did this.

Remove the alternator and the fan bracket.