James,
There are a lot of good threads on the site from new people asking about buying a Cobra. You also have some right there in Hawaii that would be good to talk to as they have gone through the experience and you could look at their Cobras and get some ideas. Depending on the parts that you might want to interchange, that is hard to answer. Some Cobras are true to the original size and design, more or less, and others vary widely in wheel base and size. Sorry I can't give you a definate answer, but that is just hard to do. To quote Earl's Flying Cobras, Research, Research, and more Research.
Ron