Fully agree with Clive's comments. If you have the time, space etc this is not beyond the keen amateur as long as you recognise your own weaknesses as well as strengths; do not attempt something beyond your own capabiliites and the only daft question is the one you did not ask.
Not sure where in the country you are but I am sure local group can provide details of a local Triumph/classic friendly garage and useful machine shop. If I have had to use others then I tend to opt for me supplying the parts, usually Club Shop, Jigsaw or Canleys, so I know the standard of parts being being used.
Dick