How heavy a toad can a 91SP tow?

[ajgibb2002]

I'm the new owner of a 91SP---Turbocharged Cat 3208, 300hp; GVWR is
around 37,400. I want to buy a used SUV as a toad. I would like to get
a Tahoe or Yukon but am concerned that I would have trouble on any
hills or mountains because of the approximately 5400 lb. curb weight.
I would appreciate hearing from forum members who have towing
experience with an 89-92 SP. I would like to hear what works and,
especially (!), what doesn't work.

Thanks much
Austin Gibbons
91SP36