my TR4 clutch is operating near the top of the pedal ie depress about 1/2 inch to disengage clutch ...I would like it to operate lower down or halfway through the pedal travel...which adjustment please...can I get to the adjustment under the car or do I remove the drive tunnel?

Morgans 1934 MX, 1947 Series 1, 1956 +4 TR4, 2000 +4 T16
Triumph Herald 1969 13/60
Morris 1970