Kyle's 77 Cutlass

Okay guy's, every one here know's about my car that is in a desperate need to be fixed. The body is rotted, and the 350 has 90,000 miles. The interior is in great condition so at least I don't have to bother with that.So now my question is,what do I start with? This will be off the frame restoration as well. Do I do the drivetrain first or the body?Don't know where to start