340 TA Block/Engine Needed!!!

Hi,
I have a 1970 Challenger TA that I bought a while ago, and I have been looking for an engine for a while. It is such a cool car and I want to make sure that I bring it back to as close to original as possible. I don't want to use a crate engine in it, I would feel that I am breaking some law. If anyone has a 340 TA Block or even better, a complete engine, that would be great.
Thanks
Author: RamRod