So I've been reading and reading and reading until my eyballs are dry and my head is even more confused with ideas than before I started. A little about me, my wife and I used to have a survivor 49 deluxe but had to sell when the septic failed at our house and the nice man that gave us our toilet privileges back needed about 10k for his time and expertise, so off the car went. We are now the proud owners of an original survivor 52 styleline deluxe. The car had 53900 when bought in September and now it has 56200 on it. We love driving it. She calls it therapy when she drives it. It is a 216 babbit "massager" car with the 3 on the tree and the 4.11 and 205 70 15 tires. The car runs great, especially after a valve adjustment. I daily drive it in town as well as we recently drove it on a 350 mile trip from Billings to Bozeman through rain, wind, and snow over the pass. Love this car! So her in lies the question. The car goes just fine down the interstate at 60-65 but the rpm's are up there as you can imagine. I've read oodles of switching to open driveshaft and the correct rear and a t-5. I don't want a t-5. Part of the reason we enjoy this car so much is the 3 on the tree. So, does going from the 4.11 to 3.55 really make that much difference in cruising rpm? I dont want to go through bunches of work to drop 300 rpm or something small like that. The other thought was to swap to a later model 3 speed to run an open shaft and keep my tree shifting and have infinite rear gear possibilities. If none of this will make a noticeable difference I'll just keep cruising what I got and enjoying it. Life in the slow lane is a good life.