Just a quick one (hopefully)

On the front subframes, how is the bottom attached?

Mine has got a couple of brackets welded onto the original frame.

My question really is, can you use mini solid mounts on the bottom, or doesn't it line up with the bulkhead?

I've not seen many coupes so I don't know but I guess the question has to be, was the tub redesigned to use the later rubber mounted subframe as std?
I've only ever seen coupes with the earlier solid frame, which as well as being solidly mounted! also has it's rear feet in a different position, certainly on my car I don't think a later frame would easily fit.

It's a long time since I stripped my Coupe but as far as I remember the rear sections of the subframe were just bolted directly to the front edge of the Coupe floor as on the standard Mini. There were certainly no extensions added.

My Coupe is 1990 and uses the old solid mount subframe too. I would think that if you're converting to the later type subframe the solid mounts would be required to take up the gap between the "legs" and the floor as i do'nt think the Mini bulkhead/floorpan was redesigned

I think I'll risk buying some solid mounts then. I'm sure it will be a better way than the brackets that are on mine at the moment. I think the subframe has a chance of movement, as the mounting holes are slotted

OK, that confirms that GTM didn't change the tub. So Tim (the other, other Tim!) 'should' be using the earlier subframe.

Ah well sort of!
Agreed the later subframe needs the mounts, either oem rubber or aftermarket solid, to fit in a Mini...but even so.... the later subframe mounts to a different part of the bulkhead on a Mini from the original design.
The early type attaches around the area where the floor meets the bulkhead, like on the coupe. But the later type mounts further up on the bulkhead, almost in line with where the rack comes through. There are a couple of strengthening plates welded to a later Mini shell here as it's a bit of a weak area, there are often cracks here.
Now this changed mounting position doesn't matter on a Mini, as of course the later frame/mounts were designed to fit the existing Mini shell, the holes are just drilled in a different place, but a coupe bulkhead is a different shape from a Mini so there's no guarentee that the new mounting position of the later subframe will line up with anything useful on the GTM.

I see what you are saying. I think I'll get hold of some of the standard mini ones and give them a try. I know my mates who hill climb beef up that area on their mini as it tends to crack and flex.

I might have to just tidy up the mountings that I've got.

Cheers

It's probably best to use your current mounts, I'm sure it's better to mount the frame to the corner like the original design.
But if you get stuck for any reason I've probably got an old pair of late type rubber mounts you can have to try. They'll be rather knackered though so I wouldn't reccommend you use them for real.