Anybody running 276 gears?
I imagine you want to go 2.76 for highway reasons ? First off do you need to in the first place what rpm be acceptable ? And what gear do you need to get there ? I wouldn't go any higher than necessarily.
I'd drive at the speed where I find the rpm acceptable, take note of that rpm and calculate the gear needed to drive at that rpm but at the speed I want to cruise at, don't forget to add some slippage rpm.
If your not too far off you could bigger tires might get you there or help dial you in.
If performance is still important to you OD would be the way to go. But another solution is get a 904 with deeper gears and lockup converter. Lockup gonna drop a few hundred rpms allowing keeping deeper rear gear plus has deeper 1 & 2 making the rear gear act deeper in those 2 gears. Could also get a 2800-3200 stall to help off the line/light.
Now you don't have to do it all at once, could pick the rear gear and tire that gives you perfered rpm without the slip calculated in so it be a few rpms higher then get the tranny with a stall/lockup deeper gears ready and swap it in down the road.
Still be able to cruise while keeping as much performance as you can without going OD.