hi matey
on both mine and thia car the oil return lines had to be made up
my black golf is running a Audi RS2 blower, i had them made up in leeds but i already had the correct end fittings, on mine i had thse bored out as i didnt think they were big enough
ZRP rods are really good mate, this was the customers decision. I have the IE in mine and TBH they look nearly the same in quality, both come qith ARP bolts, go for it
Again it was the customers choice of box too, but i used to have the abf box in mine and did close to 150 MPH
im not a fan of the diesel boxes.
the mk4 GTI box i have now is same ratios as ABF but i had a VR6 final drive put in for a bit extra on top end.. IMO this is the perfect box for mk3 20VT
hope this helps