Ferrari V12 Bad Valve Guides | GM 8.1 Rocker Stud Upgrade | Engine Rehab Tech Talk

Today, we're building on the 8.1 videos by showing you how to do a 7/16" rocker stud upgrade on the 8.1 cylinder heads. This also applies to anything that would need a screw in stud conversion. THEN, you get a sneak peak at the Ferrari 5.5L V12 rebuild that's coming up. This is high level stuff, and 3 other guys passed on it before I got involved. This is a fun one! Hang on tight.