I hope that someone can help. I am purchasing an old home (built 1885). The old fireplace and chimney had been removed years ago. I would like to install a new, direct vent gas fireplace with the look of an old victorian. I have found the perfect antique cast iron surround, however the firebox is the problem. A new gas firebox will be larger than the opening on the surround, however the surround is larger than the firebox. Can I just install the firebox and cover most of it with the surround? I know that I will not be able to use the blower this way, and that is okay. I am concerned with the cast surround touching the glass and the vents on the top and bottom of the fireplace. Thank you for your help.