.
.
TerrySpoke to Tony Byford this morning , ( Bristol & early BMW engine and Gearbox specialist. )
He assures me that he and many other Bristol engine builders in the UK use:-
The Borg & Beck Carbon Thrust release part number 3301 which is used on the MGBGT 1800. it will fit both Standard Bristol configuration and modified
.e.g. MGBGT 8.5" Cover plate & AP CP5352/1 Centre Plate.
Borg & Beck 3301 For MGBGT 1800 should be easy to locate, compared to asking for a AC Ace Bristol unit...
Good Luck
Keith.