I have found lots of 4 row radiators but I have passed on them. I only have 1.5" clearance between the fan blades and the existing 2" radiator core, and since the 4 row ones are 5/8" thicker I figured 7/8" clearance would be too close for comfort. Does this make sense or is 7/8" enough clearance?
Will not be a problem.
As mentioned plug/cap the outlets for the cooler and go.
Only issue may be if you have to mount in the 6 cyl position and do not have the cut outs in the lower cowl to accommodate the outlets, other wise go for it.
It would be tight but i see no issue providing your engine and trans mounts are in good shape.
Keep in mind more core rows is not necessarily better to assist in cooling issues and may have the reverse effect and cause them.