Thank you John Twist for great YouTube segment on tuning SU’s. My ‘73 GT had not run in 30+ years. The car now runs but very rough. I used the YouTube segment but the rear unit would not enrich. I pulled the unit back off and discovered the screw frozen in the body full clock wise. It’s been soaking in liquid wrench but dare I try to use the heat method. Great stuff on YouTube. Thanks in advance
Bill Paul
Original owner.