Just picked up a 69 Cuda...

Hi everyone, I'm a new member to this board but not new to Mopars. They have been in my family for my entire life. My father owns a beautiful 1969 Roadrunner with a 426 Hemi sitting under a 1071 BDS blower on E85. Let's just say it makes some serious horsepower, like way into the four digits.

As for me, I just turned 20 a few months ago, have been saving up some cash and just picked up my car. This Saturday (10-13-2012) I bought a 1969 Fastback cuda. I have my own idea what I'm doing but I need to get rid of that 340. Not a fan of them at all. I've known about such swaps and have even been finding Hemi motors before I had the car. I'm a strong believer that everything is better with a hemi lol. I'm not sure whether to go with the 5.7l, which I could pick up very soon for cheap. Or hold out and try to find a 6.1, or even bigger. I'm looking to come close to 500hp. Also don't want to do a lot of trans work since I'm not the greatest with em. I got the 727 and have heard of simple swaps, and swaps from hell.

So, any help would be great. Is the 6.1 an overall better motor to shoot for? Can a 5.7l make good power and be a strong motor? Also remember that I'm a 20 year old, working two jobs, and going to school full time. Dropping cash isn't easy for me and I need a decent price.

I came up with the number 500 because it's a great overall number. I own an 86 Grand National that makes that and the car is lethal. Also looking to put a 150-200 shot of juice on the hemi. Again, any and all information, advice, or just words of wisdom will help.
much appreciated, and I'm glad to finally be a Mopar owner!