Dom,
Some years ago, I was driving a 1969 T Targa, my first 911. After a year or so of getting used to it, I felt the need for MORE. You know the feeling, more revs, more low end, more mid range, more power, etc...
I was fortunate to find a freshly rebuilt 2,4L 911E engine and was able to swap out all my ancillaries, Webers, Heat exchangers, Fan, Alternator, flywheel, etc, and bolt it up to my old venerable 901 box.
What a transformation! I absolutely loved to drive the car again, and the power through the gears was dramatically changed. It also ran on regular fuel, with the 2.4's lowered compression.
This is a change you could do with a minimum of disruption to your car, and it would be just as easy (tho not as fun) to change back later...
Good luck, enjoy the trip, whatever you decide...
