RE: I need some basic info. on Enya .29 engine.
Actually thats not true. Yes the motor might have run like a champ but it's not broken it. If you have a more recent Fox 35[50th anniv model ] it's fit up a little looser then previous models and will hold a setting faster then the older ones. however it still needs a fair amount of careful running to realize maximum lifespan. And remember it dosn't take too many lean runs, broken in or not ,to ruin the fit.
In regard to the Enya though it does not have the luxury of loose fits and I've not seen one that would run well after one run on the bench.