Not sure of the value of mousetrap springs. I use a 3 speed box with 1925 engine & have a 4 speed release bearing and the later clutch fingers. No mousetraps, no problem.

Ruairidh

I have thi 4 speed arrangement on 1932 car detail on the DA7C website. Which should apply to a 1929 A7.

http://www.da7c.co.uk/technical_torque_articles/3_to_4speed_gearbox_conversion.htm

Douglas

Thank you Douglas and Charles.