help with headers
If you're trying to fit into a tight angled space with a regular 90º allen key, then you can use an angle grinder to shorten the arm of the allen key driving the bolt (to attain more clearance). Alternatively, cut off a straight 1/2" piece of the allen key to stick into the bolt, then use a small boxed-end wrench (or socket wrench) to drive it. Be creative.
Can't really say more than that without seeing what you're doing. I have a whole bunch of different allen drivers -- t-handles with pivoting ball ends, things that look like swiss-army knives, etc. I don't like allen header bolts, in general. Much prefer 6/12-point bolts you can use with a wrench.


