what closer do you recommend


LCN does not recommend this type of installation, and has never sold a coupler to do this.
The Dor-O-Matic overhead concealed manual door closers have been obsolete since 1999, and there are no parts available for them.
The 1040 and 1050 are obsolete closers made in the 50's, 60's, and 70's. The 1260 or 1460 will work as replacements, but they are not direct replacement.
The maximum recommended door weight for LCN closers is 225 lbs.