I recently converted my 99 eclipse from a 4 speed auto, to 5 speed manual, and it seems as if, In 5th gear, going 60 mph, the rpms run 3-400rpm higher than if I was going the same speed in the automatic. should it be like this? or could my tac just be off?

I do have a massive vaccum leak because my IACV is bad, so I had to take a vaccum line off for it to not stall while Idling.