I've got a 53 Chevy hardtop that needs roof replacement. A lot of rust in both A-pillars, above the windshield and above the rear window. I'm looking for tips on the correct places to cut to remove the original roof and then be able to weld in the replacement with hope for some strength. Can it get separated at some factory joints for easy replacement? Not planning on chopping, but maybe folks who've chopped a 53-54 Chevy hardtop would have some thoughts.