Re: Henry's 55 Constellation

Posted by HH56 On 2015/6/1 16:17:09

Nice. How thick is your heater gasket and do you have the small bracket welded onto the box which screws to the firewall just under the ballast resistor? I believe that bracket is all that holds the upper box close. IIRC, the gasket is fairly thick but somewhat soft and compressible -- maybe around 3/16" thick. Am fairly sure those holes you have circled were not for the heater box but what about the fiberglass plenum on the inside. Were any of those screws long enough to go thru the insulator pad and into the firewall or is the plenum just mounted to standoff brackets welded to the firewall?