Another option is to buy a car that is already converted or a project that has stalled. Watch e-bay and the auto trader magazines for deals.
I found my 280 project after someone here posted a heads up about a car on ebay. It was only 30 miles away so I want to check it out.The body was good and it had a freshly rebuilt 350 and 700r4 trans.I bought the car for a little over 2 grand,there are receipts for well over 3 grand in parts plus the body was in better shape than the car I was going to convert.
deals are out there if you take your time and look for them,buy used parts from guys that are upgrading their rides or cleaning out their garage.
Grumpy is right about car clubs they are a great way to meet people who can help you out. Later, Tom