Well, if you want to do this right:

1. New water pump and associated o-ring and gaskets
2. New thermostat and o-ring.
3. New exhaust system (if yours hasn't been replaced in a while) and
gaskets.  Six two hole and two three hole exhaust gaskets. New bolts and
nuts too.
3.5 Intake manifold gaskets (might come with the engine).
4. Fuel injector o-rings, four large and four small.
5. New o-ring for distributor shaft. (Might as well, it will leak oil on
top of your new engine if you leave the old one on.)
6. New Bosch Plus 4 spark plugs.
7. New rotor, cap, and wires.
8. New belt(s)
9. K&N air filter
10. New fuel lines and clamps (http://vanagain.com)
11. New vacuum lines
12. New coolant hoses, or at a minimum replace the two short hoses on
the engine that connect the thermostat housing and water pump to the
engine.
13. Long life Dexcool or Prestone orange coolant, 3 gallons.
14. Oil and filter.
15. New complete clutch if yours has over 50,000 miles on it, or at
least a new disk.

Also, check that your throttle switches are set correctly to close at
fully open and fully closed throttle.

That's all I can think of.  Sorry, but it will be another $1000 or more
to do all of this!
--
Stuart MacMillan
Seattle

'84 Vanagon Westfalia
'65 MGB (Driven since 1969)
'74 MGB GT (Restoring)

Assisting on Restoration:
'72 MGB GT (Daughter's)
'64 MGB (Son's)

Parts cars:
'68 & '73 MGB, '67 MGB GT