swapping in another m44 will cost you around $500 (motor + shipping). Aside from costs of renting a hoist, fluids you'd need to replace, and the time you'd spend doing the work, it's relatively inexpensive.
Since you're not upgrading brakes, changing ECU or EWS, upgrading radiators, or getting a 6cyl cluster, you're saving a bit more than just the difference between a 6cyl motor and the m44.
But that's my take given my relative lack of funds and current inability to find a cheap 6cyl
