I have an 84 El Camino with a 305 and a th350. The trans has some slip in it and kind of a ruff shift. I changed the fluid and screen but it did not help much. My dad told me it could be the modulator valve. Does ts sound like it could be it? I don't know a lot about these cars so any help would be great.
No real gain to be had from doing so, in and of itself, unless you're just clearing things out (visually and physically), and simplifying it all to make room for a lot of mods like better heads/cam/intake/carb/exhaust/etc.