they have a complete package:speedo re-calibrator, HD zexel torsen diff., OEM gear set(choice of 3.42, 3.73, or 4.10), and an aluminum diff. cover. all for $644, you can also get an instalation kit for an extra 100 bucks. should i jump on this or find something else? also there is a company called PST that sells"poly-graphite" front end kits for $169 should i get this also? what is the difference between poly-graphite and reg. poly bushings?

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1991 RS LO3
mods: 14" chrome air cleaner, straight-piped after cat exhaust with one chrome dual tip on the left side.
future mods: headers, removing smog equipment, and as many cheap mods as i can find
aol s/n: budman8503

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