'23 T-Bucket Pickup
I believe that you will be pleased with that setup. I have a couple of friends with 454 Monte Carlos that came with 2:73 ratio rear gears. The 3;08 is a great ratio also. An 1800 rpm stall should be just about right. Could even go 1500 if the cam would permit. The camshaft manufacturer can recommend the proper stall speed converter if in doubt. Playing with the size of the primary jets in the carb can make a significant difference in fuel mileage. I kept going smaller until I ended up with a flat spot and then went up one size. I put another 100,000 miles on my truck with the refreshed engine before I traded it. It was still running great and had never had any problems with the engine or carburetor. Running too rich of a fuel mixture will shorten engine life due to the washing of cylinder walls. Hopefully this helps.Let's remember guys, this is an El Camino, not a full size work truck. The 489 is built with STREET in mind, not drag racing.
After much debate I feel the 3.08s will serve my needs quite well. Combine all this with a proper "tight" stall convertor and the grin factor should be huge.
And hopefully without killing me on fuel.