Also check for the start of an sort of fuel leak. My 86 c20 305 700r4 3.73 31"tires. Was doing like 5mpg and found out gas tank was leaking but it was almost unnoticeable.
Sorry if this has been covered somewhere else. Been searching high and low.to no luck. I am putting a new crate engine in our 1995 suburban. The old will be going into one of my two squares,which one will depend on factors not related to the question. So I know I will need a new intake to keep...