I love my 3L

I was expecting a bit more power but I am pretty happy the way it turned out with my current setup... (04 Escape, SVT cams, taurus intakes, modded fuel rail, msds headers, adc chip, 2 inch gutted cat pipe

, modded svt exhaust, stock accordian tube)
This year with a couple of more refinements I am hoping to hit high 13's
The swap was pretty straight forward nothing too diffucult... I replaced most bolts/parts and powdercoated most of the parts in the engine bay while I was at it including the subframce
I don't think that you would run into any problems since you already swapped your 2.5 2 times
The only thing would be the fuel rail which is tricky if you are doing a full 3L swap