Been toying with the idea of going turbo, CJ contain your orgasms.
Pretty sure my Grandpa has a Powerglide laying around which = free. My AJE cross member is made for TH350's and Glides. Glides hold a lot of power, and it will probably only need a refresh. If he doesn't have it anymore I can buy one for nothing. I can spend the money that would go to headers ($650+ for stainless Kooks) and get a Borg Warner S475 or an MP70 or 76. If it was turbo a nice $800+ converter wouldn't be mandatory so I could go with a regular converter. I've seen intercoolers rob lots of power plenty of times at the dyno, I could save money and make more power by not using one. N20 is a great intercooler + meth kit. Meth itself is cheap. This would save a lot on cold side fabricating. Turbos act like mufflers, so exhaust wouldn't be a big issue, just run a down pipe and end it somewhere under the car, if it's too loud put a Magnaflow on it. Instead of getting a $700 cam kit from TSP I could get a $50 LS6 cam, which is great for turbos, $50 LS6 springs and $100 rods.
Some of the added costs off hand would be the big ass fuel injectors/system, and the turbo kit necessities like BOV + wastegate.
I've almost talked myself into this. If anything building a ground up turbo kit will be a learning experience.