Head Gasket Question

[MattPSU]

I have the dreaded, leaking 706 heads. There's water coming out one of the header bolts. It's no pouring out, but it is leaking slowly. There hasn't been any water in my oil - I've been keeping an eye on that - but I wanted to swap these out before I ran into more problems.

My buddy gave me a set of 862 heads that were part of a deal when he bought a truck. They were on a boosted motor that had been disassembled. They've had the gap filled and the face machined so that they could run LS9 head gaskets. (see picture for reference). From what I gather, those gaskets have a bigger bore, but hold up better in boosted motors.

When I swap these into place, should I pick up a set of LS9 gaskets, or will I be OK with the stock 5.3L gaskets since I don't plan to do anything else to this motor?

While I'm at it - what's the input on these eBay gasket kits that have all the gaskets and the head bolts for like $120?

Thanks - Matt