Hi and welcome, we have bought a new C/T, but still have our old Bushwacker as back up for the kids to use, we bought ours in mid 1974 for $750 and for another $200, got the free standing 8' annex with steel internal frame. Our unit has green canvas and different window style. Your's is the later model if my memory is correct, is your's the 10 or 12 in wheel version as this is the give away for year of manufacture. We dragged our's all over SA, NSW, Q'ld and Vic for the past 35 years without 1 punture. Hope you ehjoy the re-build.
Squirell/Graeme