You lost to a 99 Galant?What year is the Towncar?That is what it is right?If it has the 4.6L than you also have the 4R70W transmission.
Check out www.dirtydogperformance.com for a high stall converter and look into a 100 shot of nitrious.Good for low 14’s high 13’s on street tires.Your car is a mid 16 car right now at best.
I run one of his 3500 stalls in my car now and it is a night and day differance and .6-.7 tenths off the quarter mile on street tires.