Welcome to the board Stefan.
There are a number of 4.5 owners on the board, but I'm not sure how many in the Bay Area. I know there have been some threads about good salvage/parts yards and some good mechanics too.
Good job on the heater levers. Not too bad if you take your time and the finished product is great, having heat at your finger tips

. Do a search on "blower motor", Aaron has posted the how to a couple times, I think both the book version and the shortcut (for non-purists). The shortcut saves a lot of time and trouble, but requires some cutting I think.
You could also just spend an ungodly amount of time reading through ALL of the posts in the Vintage forum, going back a couple three years. Have fun.
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Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.