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Eurolook,
I have almost the very same engine, you're talking about. You will not need to C/W the crank, as it is a very stout unit, but I do recomend you get all of the bottom end balanced as one unit(crank, rods, flyewheel and clutch assembly), spend the money there.
The heads will work about the same with just a quality 3 angle grind, and a bit of porting on the exhaust side(you can do this yourself, not much needed, since you're not planning to spin the engine past 6,000RPMS) and you may be able to use the money you saved towards a good exhaust system. Always think of an engine as one unit, and get the pieces accordingly to work in unison. since you want torque, get something like the Web86, or something smaler. Your valves are big enough, not the bigest, but big enough to flow for this size engine.
The mallory unit is definitely recomended, as it will simplify your timing and tuning, while giving you a constant "pulse"
The 1910 is a great engine. I have a different setup, where my camshaft has just a bit more duration than stock, but almost no overlap(turbo grind) and .500" lift(I have smaller valves on the intake)
The DTM is a great unit. Make sure you get all of the surounding tin as well(saves you time and in the end, money too) all of the work is done for you, and it completely seals the engine bay. Get a good quality set of plug wires, and Scirocco Bosch plugs, and you wil be set.
make sure your carbs are jetted propperly and that you have a good quality linkage system. Since you want low down torque, get venturies on the smaller side of the scale, and use the 44IDF Air Velocity stacks with taller intake manifolds(sort of like a ram air effect) The 40's is the perfect size for this engine, trust me.
i would get a ighter flywheel, it's worked for me on a smaller engine.
Hope this helps.
Ephry
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