Grant GT Horn Hookup

[hellrazrblade]

When I got my '71 Blazer, the horn did not work. It has one of the Grant GT steering wheels installed w/ a horn button. I have checked around under the hood, and I cannot find a horn installed anywhere. How would I go about hooking up a horn? I haven't even gotten into a steering column before, so let me know what other information you need. I can take all the pictures you could possibly want, just let me know.

Also, i got some 4degree shims installed up front to lessen the driveshaft angle, and it gave me negative camber (so obviously it likes to wander a bit). However, it now turns right when the steering wheel is straight. In order to go straight, i have to have the wheel turned like in the picture. Is there something wrong, or is this to be expected?

Thanks