i did a manual conversion to my old 32. cost around $800 all up with parts & labour.
scored the conversion for for real cheap!
you'll need manual gearbox, clutch, flywheel + manual flywheel bolts, manual gb crossmember, clutch master & slave cylinder + lines & bolts, manual brake pedal & clutch pedal, interior shifter surround, manual gearbox wiring loom ( get the reverse lights to work), manual tailshaft. you can ise the auto ECU as i did that on my 32.
if you are in no rush, shop around for the parts & you will save some cash gl with it and let us know how you go.