SHE LIVES!!!
got home about an hour ago, to find that my dad had infact swapped the coolant feed line, topped up the cooling system, and refitted all the heatshields.
so i refitted the inlet pipe, airbox, hot pipe (which i removed twice again because id forgotten something), refitted the little boost controller dohicky whatsit, macguyver'd a couple hous clamps, crossed my fingers, and started her up.
no leaks, no strange noise (aside from the usual sr noises ), and yeah, beauty. so stoked. fairly sure im gonna be doing the dishes for the next month though, lol. its a bit ghetto at the moment, doesnt have the stone tray fitted, and the outlet snout on the turbo hasnt been torqued up, but shes running and not leaking. so im happy.