Lots of good info in this thread. A few punch lines I would reiterate to the OP
1 - With the intended use of this car as being a bunch of highway running, you would benefit from a wide ratio, especially with a car happy with a 3.25 rear. It's not an opinion, and it doesn't mean you have to, but it would allow the current gear with a bit more street manners
2 - Most cars are expenses not investments, so if you want to row gears, and you don't want to spend the cash, you don't HAVE to convert it. I drove a 433 inch Mustang with a Portosonic, 250@.050 LSA cam, 1000 Holley and 3.00 gear from Vegas to Huntington Beach and back with a close ratio and it was miserable in LA and Anaheim traffic, really miserable, but was also not built for that, but did OK on the highway. Would I recommend it in a heavier car, no, but if the engine is mild enough, and the clutch was happy, it'd work
3 - If you do want to set it up for highway and stoplight, maybe sell the big in and find a small input wide ratio, you may find you end up ahead. Clutches become much easier to find too, with more options
Remember, everything is a trade off, peaky engine, needs lots of close gears, mild engine, recovers from wide ratios well and actually prefers it. When I build or help spec a car, I start with use, it often takes longer than the build itself to get to the real goal of the owner, then you look at budget and realign if required. I think a good clean up, reseal and paint on a big in/out could get you a sale to fund a heck of a wide ratio and likely a clutch/flywheel too.