I'm still running the original 34k miles 229 v6 in mine. the only thing I've changed is the exhaust, running stock manifolds I ran dual exhaust, 2.25 inch pipe with 40 series flowmaster mufflers. I was afraid of it being too loud, or sounding too much like a "bumblebee", but I was pleasantly surprised at both the quality of the sound and performance. it seems like it picked up maybe 20 hp. i haven't done anything to the car since last fall, but with gas prices going up, i am considering keeping the v6 for a while longer, so I'm interested in seeing what a 4bbl will do, also if i ever get it done, swapping in a 3.73 posi unit in the rear.
anyone else beefing up the 229, keep posting!