Forgive me if this comes off harsh but your mechanic is a jerk-off who doesn't know what he's doing and you've been ripped-off royally. If you paid w/ a CC, file a complaint and get your $$ back for ALL of the labor and take it somewhere else that has a good rep for 911 suspension work and that owns a set of CB scales.
Why you would want to maintain a relationship w/ this guy is beyond me. He grossly over-charged you and mucked-up your car, period. Anytime significant suspension work is done on a torsion bar 911, a proper 4-wheel alignment w/ CB is called for. Why on earth would anyone not want to do it? It's a piece of cake if the rest of the work/assembly was done correctly and w/o it you can wind up w/ a *3-legged chair* even if ride height looks OK. It always needs to be checked, he's dead wrong. And he installed the bushings wrong.
Get a labor quote from a good, well-known Porsche shop like TRE Motorsports in CA. for installing those bushings and doing an alignment w/ CB. Use that as a guide when shopping for a shop in your area. Use the local PCA or this board to find the good suspension place for Porsches in your area. If you have to drive 50 miles, do it and take the train home.
Another thing, and it's the best general advice I could ever give: always use specialists in life wherever possible. Suspension work requires a suspension specialist. A Porsche suspension specialist. Using specialists for anything, (not just cars), is usually cheaper and a lot smarter in the end. There is a guy in another thread who let the tow truck driver who picked-up his 911 rebuild his engine w/ predictably disastrous results. That's like getting a vasectomy from your butcher. Your story is not as extreme but of course the results were a huge FAIL. Hope you get it sorted soon, it's all easily corrected as long as you get your $$ back.
