Done them on my own ,5 -6 hours ish ,depends on any rusted/damaged in bolts ( crossmember ,propshafts,etc)
a little tip ,after you drill out the rivets around the gear stick gaiter and you can blindly access the top bell housing bolts with long extensions , if on own use a propper gearbox jack !
fit a heavy duty clutch fork whist your at it , if it hasnt failed yet ,it WILL