4.3,
No, my truck isn't a 2 speed but the rear drums are ribbed or finned or whatever. I got the wheels off of a truck that burned and at that time they were only about a year old (nearly 7 years ago). They would start over the studs but that was about as far as they would go. I didn't want to try any modifications that would prevent me from returning them and getting my money back, so I returned them and dealt with my 20"ers. Hope you guys have better luck with yours,
Scott
