Denis has reminded me (
) that he sent me a spec sheet on these cars earlier this year. The main differences are:
BT16 - SCA, Hewland Mk 7, 1300 series driveshafts, 18 gallons held in two side tanks
BT15 - MAE (or Holbay R65), Hewland Mk 6, 1100 series driveshafts, 7 gallon seat tank
BT14 - twin cam, Hewland Mk IV (optional Mk 5), 1300 series driveshafts, 7 gallon seat tank
Wheels and chassis dimensions are the same. Simon has volunteered (I think that's the right word!) to help me recognise the minor chasis differences around the rear but he's confident that the frames had to be made slightly differently by AM.
These details are also on the other two relevant threads.
Allen