Postby smj999smj » Tue Jan 07, 2014 1:26 pm
The "better choice" is debatable. The 3.3L is adequate power for most, but the power of the 3.5L takes it to another level. Gas mileage is likely to be slightly better for the 3.5L, as well, depending on how you drive.
The timing belt job isn't bad to do. The early R50's do have an A/C line that runs directly in front of the timing cover, so the system needs to be evacuated to remove the line and later the system will need to be recharged. The biggest obstacle for most in the job is loosening and tightening the crank bolt. If you have access to a 1/2" drive air ratchet that is short enough to fit, it's not a big deal. If you have nothing but hand tools, then it is a bit more difficult.