Very clean!
Remember that to fit the 5-speed 'box you need to cut and then box out a section of the passenger side chassis rail. I think the Fiesta Centre still do a weld in kit for this, but it's worth speaking to your MOT man first as a few of them feel this is an unacceptable mod that compromises the strength of the monocoque.
I've seen a Mk1 fitted with a slip from an RS Turbo as well, worth doing at the same time.
A mate of mine from school rebuilt a shed of a Supersport, it was gorgeous until he ploughed it over a roundabout. It was fixable, and I nearly picked it up for £150 - I already had all the parts needed to fix it.
Unfortunately some other guy beat me to it. tied it to a tree and reversed hard to straighten the tie rod, took it for a blast on a wet road and rolled it
Such is life.