Which Coolant to use in a new L31, and which intake gasket?

[msg]

The search Ive found shows GM uses Dex Cool but does it matter which brand? Prestone, AC Delco? This will not be a hot rod racer vehicle just normal weekend crusing around town for fun if it matters on coolant. I saw this at Walmart and nearly made a purchase.

https://www.walmart.com/ip/PRESTONE-...-1gal/16889200


Also on the intake manifold, I was going to buy felpro and called the GM Performance tech line and the guy I spoke with said that GM Makes an intake gasket for the vortec that would work best.


Then after a search I saw this guys video and he said the felpro kit was the ticket due to blow outs he was having with the GM set.

https://www.youtube.com/watch?v=30M4_hFUpN8

Before I put the wrong stuff into and on this engine I thought I would ask the gurus here.