I think your best bet is to find a set of 69' firebird or camaro with the headrests (or missing them with the openings for them) Direct bolt in swap, no headaches (pun intended )
David
http://FirstGenFirebird.org/show/closeup.mv?CarID=571 If i don't get this car back on the road soon i'm gonna go postal! On a quest for FGF knowledge 1968 Pontiac Firebird Convertible 1969 Oldsmobile Cutlass "S" Convertible *Sold*