Hi Blake,
The answer to your question depends heavily on how much money you want to spend. If I was going to do it all again I would pick me up a rolling chassis then get a longer swingarm. Then I would buy a drag race engine already built. I bought my banshee from the dealership new and have changed out almost every part on it, which is expensive and time consuming. You can get a good newer rolling chassis with title and everything except engine for around $1000. If you want an older one they go cheap, bout $450. Depending on how much power you want an engine will run from around $850 (stock), on up to 10 mil 100+ horsepower stroker $4000+. look around on ebay for more accuarte pricing, these are just prices that I remember seeing and they are subject to change.