If I remember correctly, one of the problems with a swap like that is that the non-F pipes conflict with the oil fill port.
I think the solution was to replace the F's side cover (with the oil fill port) with one from a DX, but, it's been a long time since I saw a thread on this, so I'm just going from memory.
USAF: 1989-1997. Desert Shield (Saudi Arabia), Desert Storm (Kuwait, Iraq), Provide Comfort (Kurdistan), Restore Hope (Somalia), Uphold Democracy (Hati), Joint Endeavor (Bosnia), Support Hope (Rwanda). USAFR: 1997-2014. Iraqi Freedom (Iraq), Enduring Freedom (Afghanistan). Retired, Oct. 2014.