HELP!!! LS3 in a 69 Camaro

[Moseley618]

Guys I would like to find out where the best and cheapest place is to get a new 480 horse LS3. What is the cheapest anyone has seen this engine? What do I need besides the engine ie: pedals, starter, ecu, that is all I know of. I need everything to make it fit in a 69 w/ stock sub-frame. I would also like to know what headers will work and are not $3000. Also, what trans a T56 or the new TR6060? Pros and cons? This is the story, my mom bought the car new and it was passed down to me. Started the project 5 years ago with my dad. Since then he had heart problems and I now live 6 hours away. Took it to a local shop that is good a year ago and they have not done much but they are getting ready to start so I need help with a parts list.

Thanks

Kevin