Started up the Rr a few weeks ago to go to my first cruise this year. Hear a tic-tic-tic coming from the rt side manifold,,, ARGGGGHHH I tightened the nuts but the tic was still there, no problem cruise is 3 days away Ill just pull manifold an replace gasket in no time!!!! WRONG.... did a search on line and found Fel pro MS 90029 at a O R store , not near to me, the one across town!!!! I pulled the manifold and decided to go in the morning!. Went the next AM to store and picked up gasket kit. Returned, cleaned surfaces and bolted on manifold,,, Great will have her going in no time. Went to put flange gasket on and....WTF???? Its TOO SMALL!!! looks like it is for a 2 1/4 pipe flange!!!! I ran up to the closest OR and told them the prob. The "assistant" manager looked up the # and SHE said. I will have to order that gasket special and I would have to pay shipping!!!! It will take 3 days!!! I said WHAT , your application says this fits a 69 RR 383 engine, I shouldn't have to pay anything!!!! She just looked at me with a blank stare! I disnt want to wait 3 days so I left there and went to AZ, they didn't have the flange gasket either, but the town 12 miles away had it!. I said call them and make sure its for 2 1/2 exhaust. Nope,,,it 2 1/4. There are no measurements given in any book! Went down the road to a Napa, Sure the store 22 miles down the road has 12 of them!!!! have them measure it,,,,GREAT ITS 2 1/2!!!!Well get me one Ill pick it up in the AM. Next AM I picked up gasket. Took it home and installed it!,,, Success!!!! ONLY 3 days to install a manifold gasket!!!! I went for a test drive and thought OR owes me two gaskets,,, I drove across town to OR where I purchased the gasket kit and explained the prob, The Guy looked up the number and said I will have you 2 gaskets here IN THE MORNING!!!! Then WHY couldn't the "assistant" get them with out a special order and 3 days wait??????? Anyway a simple job,,,, NOT!!!! If you get a Fel Pro MS 90029, it not gonna fit you 383 or 440!,,,,Ed....PS had a good time at the cruise!