cheapest way to get hemi 3g going?

Hey guys I know this is an old post but I've been doing some research and this is the first time I'm seeing this "use jeep Cherokee manifolds" instead of the TTI's to save some cash. Considering that I want to get it running and then add a turbo setup later this would be my route to go right now. Can anyone give me a little guidance on what year/model jeep Cherokee manifolds to use so I know which ones to get. I recently found a 05 Rumblebee trans/harness/ecu/torque converter that I can pickup for $300 and save a ton of money. How can I identify whether or not the ecu has the security that doesn't allow you to mess with it? I plan on adding a cam for now to make me happy inside so no real crazy changes. Now since I can get it all for 300 and pretty handy when it comes to electronics I'm going to try my luck with making the changes to the harness myself before I go all out and get the hotwire harness, but haven't seen a reference for where everything needs to be added in for it to work in my 75 Swinger. Thanks in advance for all the help in advance guys.