See this:
https://www.tamparacing.com/phpBB2/viewtopic.php?t=37280

The sense in buying a running KA is that you can sell the motor/tranny and get some more cash to spend on your parts for the SR

Besides, chances are if they car is sitting with a blown motor, it's not going to be in very good condition. There are a lot of things under the body panels that you don't want to have to replace. Unless you're looking to spend 10,000-12,000 for the total project.