has any one replaced there clucth, how many man hrs, and what is the cost, can the clutch and parts be remanufactured.......
First of all 55000 miles is a good number on a performance gal; in fact if she is exercised I would say very good.
As for associated cost to replace here is what I know.
As I recall the OEM assembly aka clutches, pressure plate, friction disk, and flywheel are approximately $2500; now add to this the fact that your gal has 55000 miles on her I would also replace he throw-out bearing and then the labor time to remove and replace is 2-3 hours for The GT Guys however I suspect for most it would be more like 6-8 hours times the local hourly labor rate. I would expect that a turnkey cost would be in the $4500.00 range. BTW this cost estimte would be based on my expectation of dealer cost.
Yes there are alternatives but I would have to seriously consider whether it is worth the risk for a less than pleasant pedal feel and or engagement process. Most secondary clutch offerings are more aggressive and when I consider the service life that you experienced with your OEM clutch I think that I would seriously consider simply installing a new OEM replacement.
In any case it would appear that you truly enjoy and exercise your gal and for that I commend you
All the best
Shadowman