This is a very subjective issue, to renew a clutch is a fairly straightforward job as it is a wearing item, fuel pipes are to a degree, a replaceable item; based on these two issues alone it would appear worthwhile to replace these items if you like the vehicle so much.

Before embarking on a semi or restoration project, it would be prudent to undertake a full and honest assessment of the entire vehicle, this takes a lot of time and effort, this time and effort is worthwhile as it will provide useful information to make an informed decision as to what you will need to do.

Consider carefully your own capabilities, are you mechanically inclined, how much of the work can you do, and how much will you need to pay to have done, how much will this cost, and can you have the vehicle off the road to perform some of the potential tasks you may find. In summary, only you can make the decision.

Replace items such as fuel pipes with copper, or cupro-nickel items, these are available at a price, but will save money in the long term, if you intend keeping the vehicle, ensure this is not in contact with steel components to prevent electrolytic reaction, i.e. mount it on plastic clips. Build modern technology into the vehicle wherever possible to ensure longevity, this may include items such as a stainless exhaust for example.

Never forget, if the vehicle needs a part restoration, it always takes three times as long as originally anticipated, and alwasy ends up costing twice as much.

Good Luck