A better approach would be to ask what preventative maintenance you need to undertake.
The first thing I would do is read every thing you can find about your carb and distributor.
Secondly buy yourself a bentley manual (bentley publishing), much better than haynes
Thirdly change your fuel lines and filter, make sure each union has a fuel hose clamp not just push fitted.
Then work through the service maintenance schedule in your new Bentley manual.
Basic service:
Set tappits on a cold engine
Change oil
new points and condenser or fit a petronix and never have to worry about points again
New HT leads cap and rotor arm
Set timing with a strobe
Grease front beam
Change gearbox oil
Check brake pads and adjust
Check oil level in steering box
All of the above can be done in a day, there are other things like repacking wheel bearings but the above is the basics I would do on a van I had just bought.
I would work on the assumption that things have not been done correctly in the past or have been neglected. If you go through everything at least you know what youve got.
