I highly doubt it can be done PROPERLY without spending 25K, up here probably 30K+ and that is the vast majority done by the owner. I am talking similar handling, braking and power. You guys are talking a lot of luck on buying used parts. A 4L80E core go for $500+, good converter for them is easily that and the 5.3 is similar here. It still leaves a meh ratio 4 spd OD or old school TH400 and tall gearing.
My wagon was headed to mid-11s before the nitrous went wonky. She's a big girl, with as many amenities as possible, it is for all intents and purposes a modern interpretation of a 40 year old car. $40-50K to reproduce/replace.
My Hellcat was $59.6K (before fees and such) and trumps the wagon (in all categories) because it is a fully engineered solution. That simplicity had a value to me.
Plus, there's the Monte which will be none of those things... which is even cooler - because it makes all those compromises the Hellcat can't. My point is execute your visions, don't sweat a media driven measuring stick.