someone gutted out the heat on car. some questions.. need help

Gee Heck In Virginia We Would Use Duct Tape,lol How Is It Going Plot? The Holes In The Fire Wall I Would Fab Me Some Sheet Metal And Welld Or Revit It Over The Hole Smooth The Edges With Filler And Paint The Sucker. As Far As The Inside Under The Dash Find You A Cap Of Some Type And Jb Weld It In Place. If You Are Not Going To Show It Tell Anyone That Looks To Get The Hell Out Of Your Car. Just A Redneck Thought. Keep In Touch My Friend And Good Luck. Steve