[rochester bob]

Dean, I've got the 48IDF's but I've had 48IDA's on the car before and they don't tune that much different. I didn't get a answer that fast so I was trying it out and found that I had to go down 2 jet sizes (idle jets) with the air cleaners on. Now the bad news, it was still a little rich. Ok mixture at idle, a little rich at cruise and accel, But when I let off, the carbs went real lean I said real lean. So as I see it, I would not run the air cleaners because of an uncontrollable air fuel ratio. Bob