[Shotimes] And yet, more problems... bucking/surging

[Your Name]

Welp, my fabulously unreliable and ever breaking '91 has developed 
another issue.  Sometimes I'm driving along and the engine bogs 
down... It never dies, but it doesn't 'go', push the gas further, 
still nothing, stays running, but doesn't move.  Doesn't do this at 
idle, only when in gear and moving, seems to happen in all gears, but 
gets less likely in 4th and haven't had it happen in 5th. It seems 
like it's not getting fuel, but I don't think that is the issue. Am I 
looking at a CAM position sensor here?   Any other ideas?