A body big block power steering gearbox

When you talk about TRW, Federal and Saginaw "boxes", you really mean "pumps" don't you? When it comes to pumps- the TRW or the Federal would be correct for your car. Visually, the two are very similar. I usually think of the Saginaw as a '69 and later pump. Visually the Saginaw is very different.