[ss6]

You can do your own valve adjust on a 6 conversion, though you'll have to grind down some of the ribs on the lower "turbo" valve covers to get them to slide past the inboard rear suspension pivots. Just think of it as a more productive version of calisthenics. Level of PITA is directly related to how cleanly you lay out hoses, filters, and wires in the engine bay.

Mike, there's an interesting thread on the 911 board claiming the 996's are not track oriented motors, so maybe you won't see too many 996 conversions. Allegedly, Porsche's current GT's are built on the 993 platform(!), not the 996. Not a resounding endorsement of the latest flagship.

Doing a conversion is just a slightly more advanced version of the "I wanna work on my own car" disease. Some people prefer wrenches to checkbooks, those of us who own 914's usually wind up being very good at wielding both. Just do it.