Both Ways You Are Screwed If You Don't Have Enough Knowledge And Experience Or Won't Find Someone Sincere With JOB..
Efi Swaps Are NO JOKE If You Are Taken Them Easy......Just Visit The SWAPS And Read All Good 30+ Pages Discussion...
The Way Swaps Are Done Here Are To Be Taken Care Off By Owner.....! If He DON'T....He's Screwed....!
Same Goes In Overhaul.......Sourcing Genuine Parts...ANd Rebuild Procedure Requires Expertise....
Keep In Mind That Overhauling Engine Properly And JUST Replacing And Fitting Things Back Are Different....