Given the time frame you mention Cobraboy, I imagine I don't have Alan's uprated bushes, so I'll have to get in touch with him.
JP928, that looks, well, frankly terrifying! You're a bit too far away for me to try your gearbox.
Mike Coombs, I think later MG V8s had a more advanced iteration of my gearbox labelled R380 or something, and I was given to understand they are rare, expensive, and allegedly not really much of an improvement over the LT77. All hearsay. I've never driven anything with either a Mazda or later Land Rover gearbox so I'm not speaking from experience. Thanks for the info about softer lower bushes and not tightening the bolts before the car is settled. I've got purple poly everywhere, and I don't recall precisely but I suspect the bolts were tightened long before the car was fitted with a drivetrain, interior, external panels etc. etc. !! Perhaps that is another reason for all the noises it makes when it actually propels itself along!? Lots of food for thought, anyway.