OK, a quick review of previous posts shows that the clutch pedal is actually offset to the right. This was to avoid the transmission tunnel in the original MX5, and will do exactly the same job here. So I'll mark up the position of the master cylinders and drill holes to mount in the required position, but also retain the spacing that I had originally planned for.
I also need to weld on one more plate for the pedal brackets, this will sit parallel to the floor. Normally it's bolted to the floor, but there's zero strength in the floor. So in my case it'll be bolted to the frame. What I'm planning to do is cut out a section of the chassis and replace it with thicker steel. This will then be drilled and tapped to accept suitable fixings. I had thought of rivnut or similar captive nuts, but this will be inside the frame and amazingly fiddly to get to if they go rusty. So it's just easier to make it part of the frame itself. It also needs to be completely flush, which also removes the possibility of a rivnut.
Of course, I want to compare this plan with the original, just in case I've missed a trick here.
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