I have currently been mulling over purchasing an MG or a TR6, having always loved the look, the lines, the absolute originality of design.Call it a mid-life crisis, bucket list item, or just plain desire but the thought has been with me for a long time.What I wish to know, if you can assist, is what would I be looking for while inspecting one of these fine cars?Do they come with disc brakes, or drums?If drum brakes, is there any 'kit' or the ability to transfer the braking system over to disc?Not sure which models have the overdrive(unless they state it), so that to brings about a want in the car.Some do not come with the wire rims; so would be curious as to what wire rims would be the best for them, as well as what tires would be the preferred make and size to have the performance a vehicle like these deserves.I am also a true Canadian driver, which means all seasons. so winter tires; what would be recommended for these vehicles?As you can tell, I am literally studying what is required, what to look for, what I should be listening for on a test drive, etc.I have looked at a few, and wonder if you could give some information as to the overdrive asked about, and any other help, if it is at all possible.I would be extremely appreciative of your assistance, and thank you. My list, with what info I have, is here:1969 MG/MGC 6 cyl. (Overdrive?)1970 MGB/GT Is this a 6 cylinder? Overdrive?1975 MG/MGB Roadster Is it a 6 Cyl.? Overdrive?1974 MG MGB/GT Cylinders? Overdrive?Most respectively, LNL