A five-point racing harness and roll bar aren't ideal for street use, especially around stock seats with the headrests removed. Once you resolve that issue, additional upgrades just push the car farther and farther from its current exercise in minimalism. A top and windows come with the sale, but are they absolutely necessary? Look, you get a rust-free MG competitor with a five-speed manual transmission, two seats, and a clean title for just $5,000. Anything else is superfluous.
PhiLOL actually likes the tuna here, but abhors structural rust. Save the manuals.