I have a 81 Mark twain with a hallow stringer the engine mount sits on. The shell is still there and I was wondering if I could plug out a few holes along the top and fill it with epoxy resin, let it cure and harden then remount my engine? The reason I ask is cause the floor is so solid and the interior is so nice plus the cost of ripping everything out to do it right I think I'd rather part it out if you all don't think my idea would work. Thanks, Chris