Why no dust cover?

Nope! Only mechanics removed and did not put back that I know of. It’s the lower support on the manuals.
The small cover for autos were removed by wrenches draining the converter and were just lazy not reinstalling it.

No dirt roads or rain driving , I haven`thumbnail - Copy (2).jpg FullSizeRender (2).jpg t ran a 727 dust cover since 1968 . Two 426 hemis ,two 406 sbc , and now a a 440/505 . I think it helps the convertor to run a little cooler