Type 9 Gearbox Overhaul

[Pugly]

I'm looking to rebuild the Type 9 in my Ginetta whilst it's out for an engine swap - it's a Quaife tinkered straight cut Type 9 - is this a DIY'able job? Never really meddled with gearboxes (have rebuilt carbs and done a few engine swaps so not too mechanically inept)

Have heard from a few people that a few Haynes manuals cover this gearbox - does anyone know of one that definitely covers it? I am guessing any that covers the Sierra should include it?