I got my valve covers back on and everything together. Car even starts and seems to run okay, but I don’t know what the vacuum lines in the photo connect to. There doesn’t seem to be any vacuum on the line when I put my finger on it.

 

That's normally an elbow (or maybe just a tight bend?), not a tee. Someone must have added the junction for a vacuum gauge or something. Should be fine just capping it.

 

Thanks for the reply. I think I have it sorted now. A local guy came by with his 1997 Supra, 2JZGE (same motor as mine) and his is bone stock, so I was able to look at his for some guidance.

 

FYI - just wanted to update in case anyone else ever has the question, but that T is a factory piece.

 

For some reason, I though that was a HCV (heater control valve) when I first looked at it, but now I'm thinking it's EGR or something on a SC300? I haven't been under the hood of a 300 for a while and don't recall the layout too well. Not to mention, I stripped the crumbly EGR off my 300 when I had it.