questions about ls swap in 99 tahoe

[texasbred]

I thought about the 6.0 but right now I rather have the economy of the 4L60E tranny, and I'm worried that it wouldn't hold up for long behind a 6.0. After a secure a permanent daily driver later down the road I will do another swap with a built 6.0/4L80E combo.
From what I have read my Tahoe weighs in very close to an ext cab 2wd.


What exactly do I need from S&P for the oil pressure gauge to work? I've looked through the catalog but can't find it. I'm sure I'm overlooking it

[LS1GMCTruck]

Don't forget fans. Oh, and another vehicle to get around in, till the swap is finished.