I got a b16a tranny but bad 5th gear but I have a full b18b1 tranny out a ls integra nothing wrong with it can take the 5th gear out and put it in the b16a and keep 1st 2nd and 3ed and 4th out of the b16a tranny and have a ls 5th gear !?!??!?

 

Yes. You need both the mainshaft and countershaft gears.

You're better off running a GSR 5th though. You'd fall WAY out of VTEC with the LS 5th. It's OK for gas mileage, but I don't think the massive decrease in performance is worth it.

Specnically Speaking: B-series Gear Ratio Guide + More!

 

So I need from where my finger is here on the main shaft up
And do I need from where my finger is up on the countershaft Up
And do I need the ring gear and the hole Bear countershaft out of a b18