I think you should investigate more what you have. Nothing about that car appears as a '68 911S.

'69 on fenders
'69 on taillights
'69-'71 decklid grille
911T bumper trim
'69 on door window frames
'70 on door handles
'69 on fan housing
'70 on MFI fan shroud
fuel return line in engine compartment
'70-'72 zenith 911T carbs (no, not available in '67!)
'65-'68 engine (based on sand cast chain housing covers)

This is a very strange beast. Maybe take a very careful loom at the VIN numbers.