WTT: my '79 maple fretted P neck for your fretless one.
Had a maple-board fretless neck, sold it, regretting it, looking to replace.
Mine: '79 maple-board, B profile, frets in good shape, brass nut, no issues/not "mojo'ed", will leave on original tuners if you do too.
Yours: similar vintage, similar profile, similar condition. Maple or rosewood board is fine.
I'll try to get pics going soon.