I'm probably not gonna be the most accurate or specific, but typically a factory stock is gonna be a very entry level stock car, with restrictions on suspension parts, racing tires, bodywork, and engine components. An IMCA stock car is going to be similar at a glance, but with many of those restrictions lifted or loosened. It is a similar case with IMCA sport mods and modifieds. I don't know all the ins and outs of the differences, but I believe modifieds run alcohol fuel, where sport mods run high octane gasoline. An IMCA Sport compact is an entry level 4 cylinder front wheel drive car, like a doge neon or chevy cavalier. From what I can tell they have to be kept mostly stock, though I'd imagine there are some modifications allowed for safety and durability. I'm not familiar with eco mods, or jr Ltd mods but maybe those are what we call mod 4's and mini mods around here. Mod 4 being a smaller 4 cylinder modified and a mini mod being a small mod powered by a 600cc or 1000cc motorcycle engine. You are correct with sprint cars, big difference in classes is wing/non wing(also called traditional in some areas) and generally in each category 305, 360, and 410 are going to be the classes, referring to engine size. 305 will generally be the entry level class while 410s are what the world of outlaws and high limit sprint car series run. There are also series like the UMSS that are meant to be a low cost sprint car series, that run affordable carbureted LS engines, sbc 350s, and crate motors. They don't necessarily fall into any of those previous engine categories but would be on par with a 305. There are also smaller sprint cars called micro sprints, which, like mini mods, run 600cc or 1000cc motorcycle engines. More on reddit.com

I’m looking for dirt race track in the North Dakota, South Dakota, Minnesota area that runs MOD lites every week. More on reddit.com

The 358 mod and Big block are a northeastern style modified with a full tube chassis, which more closly resembles a sprint car chassis, where as the ump and sportsman have a stock clip in the front and a 4 link in the rear most closly relating to a late model. More on reddit.com

The govt has not resolved extreme traffic congestion and bad roads but instead spending the money on stupid ad campaigns, the zero is good thing, and this bullshit. Actual expenditure on improving infra is much better than this shit - irrespective of political leaning this should be agreeable for all in this case. More on reddit.com