One other thought, you might try to find an aftermarket (resin) engine for it. Glued plastic usually won't come apart. Testors (and most others) aren't really cement. They are solvents that work by melting the plastic. When the "glue" dries, the plastic is welded together. It's supposed to be as strong as a single piece of plastic. (Tell that to all the little, fiddley parts I keep having fall off!!) lol.
Good luck with it.
Bill
Bill
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DML M4A2 Red Army
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-- There is a fine line between "hobby" and "mental illness". (Author unknown)