if I was going to do this, I'd not reinvent the wheel..
the 95-200? has already been done..
take one 3rd/4th gen f body floor and frame rails and shove it under the monty.. john moss did this in the mid to late 90's
from what I remember of the green monster if you can cut and weld. it wasn't all that hard..
the car was in many a peterson mag.. with tons of build shots and info on what they used to make it happen..