well it shows you are from South Carolina so in your case you could probably go with the 160. The cooler your engine runs the more horsepower you will make. The reason I wouldn't do the 160 is I live in Ohio and need the car to heat up for defrosting the windows and to blow heat during winter driving. IF you do the 160 and are in a cold environment sometime, you will be waiting a LONG time to get any heat. I hade an 88" GTA years ago that I put a 160 in but had to go back to the stock one when winter hit. You probably won't have that problem though.