|I think it depends what engine was fitted to the GT. Jensen used whatever engines they had available at the time, including A74 (Dellorto), B73, B74, and T75 (Stromberg). According to Ric Calver, all Federal market GTs had the T75 engine, which may also have been fitted to very late JHs. It would be an idea to compare engine numbers between your JH and the GT. I think the main differences between B74 and T75 engines will be emissions / ignition related, and perhaps also the air box setup.
Last edited on 09-14-2015 08:31 pm by NigelK