Holly 1920 carburetor adjustments?
... Sorry I'm 24 and not used to how these old cars are supposed to smell/act and the sounds they should and shouldn't make haha. ...
The only real difference is in the controls. Some people retrofit these engines to modern computer control, even MPFI. They then run just like a modern engine. Mechanically, not much has changed. Indeed, the 3.8L V-6 in my 2002 T&C looks very familiar to an old Mopar guy. It has pushrods and stamped-steel rockers on a shaft that look just like my 1965 383. About the only difference internally is the roller lifters (after-market available for V-8's). Indeed, you can interchange the block of a Magnum 5.2L (until 2002) with a 1960's small-block V-8 (heads, transmission, and engine mounts bolt-up). In some ways, the mechanicals have become poorer (no forged cranks, ...). But, less options for a slant since it stopped production in the 1980's, so no MPFI manifolds and such available. The legendary AMC (Jeep) 4.0L straight-six is a better deal, having run from 1964 until 2006, so factory retrofits to fuel injection exist.
Perhaps a more important difference is that when the controls in a modern engine fail, the engine often doesn't run at all, which pushes you to repair it, as does the "check engine" lamp. Diagnostics are often easier too. When these old controls fail, it is more incremental, so you are tempted to just live with it. It is often hard to tell what is going on inside a carburetor. Adding an O2 sensor is a great diagnostic, especially a "wide-band" type.
