Can anyone direct me to a site to replacement vac lines and elbows for my 92' 5.7 TPI? No luck at Autozone/retail stores.

Have you tried pep boys. I know lots of times they dont have the actual part if thats what your after. Lots of times you can piece together a vacuum system with some rubber line and some elbows from the help isle or accessory isle. If you want the authentic part you could awalys try gmpartsdirect.

http://gmpartsdirect.com/partsvoice/frameset.cfm

I couldnt believe that the pcv from gm was like $30. Man they price just the lower stock tpi intake at $644.44. You could always try the junkyard to get the pieces you need.