try to contact Dave@ddm he maybe able to help .
I would contact Dave at DDM and talk to him about this and see what he suggest on repairing cost
or engine swap for you....
And then decide what direction after talking to Dave...
Would think hard on Repo direction and costing you credit score and you are still spending 18K and still a
used Slingshot ....
If everything else on yours with 9100 miles is fine I would do engine change..
Wish you well on decision..