Lagging when shifting?? (727 auto, w/ full manual valve body)

Definitely. I hardly ever take it above 3500 RPM when I'm driving. I was thinking about taking it to AAMCO(has anyone here delt with them before, and know what their pricing is like) in the morning to see if I can have a pressure test done. What should it register? Also it does have a full manual valve body, as I've found my original recipt, for the build.