replacing sheet metal can add up fast and requires alot of work, but when you say you want to turn it into something like DSE's test cars, that other car looks awfully clean to start with. If you are going to mintub and change front sub, new suspension, maybe different engine, etc. I would look for a clean project

, I know, good luck!
Is that second car as clean as it looks (rust)? my car started as a complete runner several years ago, but once I spent all that time welding on it and fixing all the rust, I sure wish I would of just found a clean tub. I ended up ditching most of the car and replacing everything all together with new and aftermarket parts anyways. And one thing is for sure nothing beats original sheet metal, replacement panels suck for the most part!