limited slip questions

["Mapes, Glenn" <gmapes@ball.com>]

> To All
> What type limited slip would be the best to use in a 64 MGB that is used
> for vintage racing only (no street driving)?
> Any idea on how much you can expect lap times to go down just by
> installing the limited slip?
> Also, has anyone had experience with the Quaife limited slip?  They can be
> purchased direct from Quaife at a cost of about $1000 (including
> shipping).
> 
> TIA
> Glenn Mapes
> 1964 MGB