www.club4ag.com
prolly the most extensive listing for all the stuff u can do. if u want a full trueno front end call and talk to jeremy or johnny and Japan direct.
www.usedengine.com they are located in raleigh, nc and ar one of the premier importers imo.
as for your stocker engine i might be interested in taking it off your hands once u get your new one.
trd 8 ways are a good shock..kinda overated though. if u are just learning to drift u should prolly leave everything stock and start collecting tires (ull eat em up fast). after u get a feel for the car would i begin only to mod the susp.
the possibilities are endless in the suspension stuff alone (4links, panhards, swaysbars, strutbars, cages)...also, keep some money set aside for stuff that wears out (remember these cars are almost 20 yrs old) and anything that might break under tough conditions like drifting (ie.tranny, axles).
is the car equiped with a LSD? if not, get one.