I have the alba kit. Alba sucks but so far the kit has been great. More pics can be seen here:
http://www.79camaro.com/camaro-gallery/album03?page=1
Before:
After:
pull the top seal out then use a 3/4 bolt and two nuts(3/4 bolt head is close enough)and use a wrench to spin the retainer out the top. Then just pull the bearing out the top.
I have this same problem with mine. Today I went riding about 3000ft higher than I normally ride and it got worse, so now I know that it's rich not lean in the mid-range. The fix for that is to lean out the needle.