Sorry, been without broadband for a fortnight.....

What dimensions do you want? The overall answer is that apart from the crankshaft mounting and ring gear dimensions all the 'key dimensions are different between the 5 speed MTX gearbox flywheel /clutch and 6 speed MT285 gearbox flywheel (DMF or solid)/clutch right down to mainshaft splines and hub clearances.

If you really want flywheel dimensions I've got some rough sketches, but set-up height and hub clearances were a bit suck it and see on my MT285 conversion with Vauxhall clutch.

Martin