Those old soft-ish, made in Japan tires from the Jeep Honcho, 1/16 Funny Cars/Top Fuel dragsters, and others are gone for good, so with new wheels to go with these tires, the Honcho kit is ready for reissue. I'm sure they could be made to work with a few other 1/25 Revell and 1/24 Monogram off-road vehicle kits, too. I'm guessing they simply feel they can get more bang for their buck investing in an aggressive, aftermarket style tire than a narrow, stock type tire.
The Revell 1/24 scale kit is a nice starting point if you are willing to accept the limitations of the 30+ year old 1/24 Monogram '70 GTX base kit. When Revell updated the GTX kit a decade plus ago, they added an all new platform style interior with nicely detailed, separate door panels, a bench seat, and a Tuff wheel. It was very nice update on an older, but well done kit. Here are some (not all that great) pics of the interior to show what can be done:
I can't recall if the Pistol Grip shifter was new or improved, too, but it's nicely done:
I bought a Sherline 4000 off eBay a few years ago for $400 or so, and it was money well spent. If you want accuracy, precision, and safety, buy one. Tool bits aren't that expensive, nor is material if you're working with aluminum or brass tube/rod. Check your local craigslist/Kijiji, too. You'll probably come up with things you can turn on the lathe which never came to mind previously, and the quality of the finished parts will speak for themselves.