I plan to lower my 1990 integra 2 inches but I want to know which bushings I will have to/ should replace while I do the install?

If your car is that old I would replace all of them with some ES bushings. It's like night and day with new bushings.

The only bushings you'll have access to during the install is upper strut rod bushings & lower control arm strut mount bushings. If you plan on installing the full kit on a '90 be ready for a multiple day install & lots of MFin'

thanks for your help guys. which are good/cheap bushings and where can I get them?

http://www.suspension.com/acura.htm

Energy Suspension as CivicSi suggested or Prothane are the major companies for the bushing market. Mugen rubber's would be the ideal choice for street use, IMO.

good site, thanks.