Powerdyne Note???

i was browsing ebay for my latest purchase, a 9psi charger for my 91 gt. i came across a powerdyne setup on ebay that i liked and was in my price range, ($1,600) but in a little note, it says this,

PLEASE NOTE: THE POWER MODULE "CHIP" AND FUEL PUMP ARE NOT INCLUDED BUT ARE IN THE PICTURE. THIS KIT IS COMPLETE WITH AN FMU FOR FUEL MANAGEMENT. NO INJECTORS OR MASS AIR METER IS NECESSARY. KIT IS SATIN FINISHED NOT POLISHED.

now what do they mean by module chip? and how big of a fuel pump do i need to buy!? now i also see something about injectors not necessary but should i pop some new injectors in there too? and how big and i have a 91 with MAF so no need to worry there, but if someone can help me out with the module chip, fuel pump, and injectors that would rule!!

oh and p.s., did anyone have an bad stories about the powerdyne setups? should i maybe save up and do a procharger or something? i'd rather keep it under $2,000 but let me know if im ganna open up a can of worms with this powerdyne setup, thanks guys!