Love how parts off one identical set up won't fit on another car with the same set up,lol...I think the full 3" will be well worth it in the end!!
I'm running a 6060 also and the crossover was good. I was not using a coolant tank at all so never had that issue! I did run my coolant tank at one time on my driver side strut tower and was ok, no clearance for the air filter thou. Currently I have my coolant tank on the passenger side and plenty of room!