It is true you would have a hard time getting more than maybe %10 more TQ without stroking it. MPG can easily be improved.

A stroker is a lot more money if you are on a tight budget, $150 turn a crank, $200 balancing (although with the KB107 you may get away without it), $266 summit kb107, re-use stock rods=$616 you can not buy a new stroker crank balancing and pistons for that even at the best sale prices. The cheapest possible way would be a SCAT crank and stumble on some NOS mopar cast pistons and even at that you will not get tight quench and decent compression without milling your block a lot.