Now you have me thinking ~~ i am impressed good job with a sweet ride ~~ i have a 1976 Dodge B200 van ( 3/4 ton ) 318 3spd auto it has headers dual exhaust edelbrock aluminum high rise manifold and edelbrock carb ( i know its a brick ) but but like you with your olds this is my baby i like to go camping and travel some plan on retiring and seeing the country ( i hope ) someday ~~ i have a Suzuki sidekick Js 4cyl 5spd with a hard top as my daily driver runs good , good on gas a no frills ride , also have a 2011 Suzuki Equator crew cab sport truck put a leer topper on it cuts down on the drag for when i need or want a truck , sweet truck and surprisingly good on gas 6cyl 5spd auto ~~ but my van is my favorite and am trying to think of ways to better fuel economy ~~ here goes i am open to all suggestions except to get rid of it ~~ all else will go the van stays