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Classicauto, Far as I know the belt slippage is due to elimination of air pump on FDs. The air pump give higher belt contact area to the pulley and hence less slippage. The Greddy pulley does wear over time and contact is questionable.
I know David Garfinkle is working on a tensioner/idler for FD... Which I'm waiting on and will be using this pump, stock pulley or Greddy, and Gar's idler. I know Pineapple also makes one but Garfinkle have sourced a heavy duty bearing that will handle high RPM and easy spin.
By the way, Welcome PAUL!
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