Graham,
It all depends on what your budget is and what exactly you are looking to have in the end.
A 3.6 in an early car is a hoot, turn the key and it starts without praying to the carb gods", is fast, big torque and less money than a full on 3.4 build.
I went for the hot rod full on built motor route, my car pulls the 3.6s around here, has an 8K red line, sounds great, looks great when you lift the deck lid and is in character with the early cars..
Again, it what you want in the finished project and most importantly what is the budget...
Good Luck,
Jimmy
