[Alan Roehrich]

My suggestion would be to call someone such as Danny Ashley or Dean Oliver and ask them what they think the best core for your needs would be.

You can often pick up some cores in decent shape at a decent price by searching ebay. Just make sure what you buy has never been "remanufactured". Those places absolutely ruin a good carburetor, drilling and plugging things, throwing away all the original screws and calibration parts, sand blasting, you name it.