Here’s a link to that for a Mustang. They’ve been around for a long time, mostly for high mileage or race engines. They’ve more common now, especially for direct injection where you’re not washing the intake with gasoline. Nothing wrong with them.
Heavy load applications (trucks, motorhomes, some marine engines) at higher rpm have a lot of slung oil flying around. In Dad’s motorhome, adding an overdrive and split shifting it to keep the rpm under 4000 on long hills, it cut the oil consumption from a qt in 500 miles in the mountains to a qt in 1000. That’s what it got in the flatlands. So I “assumed” it was frothing from higher rpm. Kind of surprised me. But that’s continuous wide open for 10-15 minutes at a time in places like the Continental divide.
https://www.cjponyparts.com/resource...hrottle%20body.