Steering gear

fill it to the top and drive it for a week; see what happens,; it will find it's own level..... lol. No joke, it will, but it will also be messy.
If your cap does not have dipstick;
>and the pump has a round-tube filler neck, then it is a Federal pump, and then you fill to the very bottom of the filler tube when cold, or a lil less, just so long as it covers the guts. With hot fluid it can be at the bottom of the filler neck, just going up the tube. If you put too much in, then when it gets hot it will puke it over the top; this is normal. After it cools to ambient temp, check the level and that will be your maximum fill.
>but if an oval tube Saginaw, then it should have a dipstick. If the dipstick is gone, then fill it same as the Federal; but this pump is a lil more forgiving and the fluid does not seem to get as hot, so is not as likely to puke. The shape of this filler neck allows for a lil more expansion.
I like this pump because it can keep up with my steering inputs, whereas the Federal is good for "normal" driving.
>If you like to do figure-8 burnouts; the Federal pump is likely to gulp air, stall, make a lotta noise, overheat the fluid, and puke a bunch of it out. I only get one or two switchs out of them, and then the assist goes away. Whereas the Saginaw will keep up pretty good.
> As for the Federal; I like the design, and it is normally trouble-free for a couple of hundred thousand miles.
> As for the Saginaw; meh on the design, but mine has been on the car for pushing 150,000 since the last rebuild, so I can't really say anything bad about it. It puts up with 7000 crank-rpm shifts just fine, whereas the Federals that I rebuilt and tried, overheated the fluid. I really wanted my Federals to work.....but in the end, the Saginaw won.