GTV Clutch "problem" and recommendation

[Robert_A_Brady@domain.elided (Robert A Brady)]

When I put the refreshed engine and trans in my '74 gtv last Spring, I 
cheaped out and installed the used clutch and pressure plate.  The clutch 
disc was in spec regarding thickness.

While it hooks up fine, after the car is warm, I can get it to slip when 
shifting from 2-3, 3-4, and 4-5 at ~6500 rpm, or so.

What is strange is that it does not slip when cold.  Any ideas?  I'm thinking 
that the pressure plate is toast, but before I put a new clutch assy in, I'd 
like to see if anyone has any insights.  Fred?

FWIW, there are no visible fluid leaks; the clutch slave is bled; the pedal 
is adjusted level with the brake.  Take-off is a little abrupt, however, 
compared to the way it was/should be.  There is also a little chatter from 
it. 

On a related note, should I stick with the stock F&S or Valeo clutch or is 
there something "better" out there.  The car is now basically a toy, which 
means it gets driven hard, then put in the garage.  It will be time trialed 
and possibly autocrossed occasionally.  Engine is stock with 105/48 cams.  I 
would not consider it to be "hot."

Thanks, 

Bob Brady, DVAROC

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