316i to 325i fuel line swap assembly problems

[adamDOT]

Right im half way through an engine swap from a 316i to a 325i, its all in and looms wired up the main problem im havving is appart from the little things which ive sorted, is the the fuel lines i have comming to the front of the car, the 316i has three pipes and looking on the 325i there is only two? have traced the pipes back, two are coming from the fuel tank which i beleive are the fuel out and fuel return, the third pipe looks like it comes from the tank in the osr quater pannel which again i beleive is the fuel vaporizer tank? which one of these pipes is comming to the wrong place and how would i get around it? i have a 325i tank of the doner car which i can swap if nessesery unless there is a simple fix for the problem?
pleaseee help thankyou.