Welcome to EM LincolnLSguy!
I highly suggest you read a bit more on this board if you are interested in modding for fuel economy. The two mods you have suggested have been proven not to increase mileage. Check out
60+ Vehicle modifications for better fuel economy - EcoModder.com for mods that are proven to work.
Also, check out
100+ hypermiling / ecodriving tips to increase gas mileage - EcoModder.com for an easier and cheaper way to increase mileage. The majority of our users see their largest gains from changing their driving habits.