I need advice on which headgaskets to use... brand and thickness.
ARP kit is on the bench and every thing is port matched. Truck does have some
add-ons for reliability and power

 

I personally like victor reinz gaskets myself. But alof of people have been using fel pro for the 6.5/6.2s.

 

My engine has a fresh rebuild with all Victor Reinz gaskets( with 0.010" thicker head gaskets). I'm currently running 12.5 psi boost. No problems.

On the last engine I had, I used Fel-Pro head gaskets (stock thickness) when replacing heads. I was running stock boost (I think 7 or 8 psi). No problems with the gaskets.

I have read in the past that either brand and either thickness is good as long as you don't boost over 14 psi. Not sure how true that is, I'm not chancing blowing my new engine to find out.