How is this for an indicator

I have just gone down this road and this is the cost so far
2nd had 3t - $300
rebuild of box - $350
dellow adaptor - $800
total so far $1450
I have not yet made a prop shaft or mounts yet.
prop shaft made and balance would be about $300
getting mounts made vaires

In total to do the whole thing yourself, i have budgeted $2000. This should end up with new everything.

So depending of quality of parts, age, condition of box, anywhere between $800 to $1500 would be fair i think.