Hi,
Welcome to family life!!! Shame you had to sell drift car, I convinced missus to keep mine!
1. Intercooler: R33 GTST (hole cut under bty) piping should be a close fit! I used Greddy R33 GTST kit and perfect fit on my S2 stagea.
2. Suspension: R33 GTST on auto stagea, R33 GTR on factory manual, top mount on rear is slightly different.
(may have lowered precedio wagon springs available soon to suit struts - DMS coil over upgrade on way!)
3. Manual: R32-33 gtr box(push or pull clutch!), R33 manual pedal set, R33 handbrake setup, search high and low for console!
Sam