Which head Gasket to buy

Hi All after the initial excitement of getting a 2004 4 L v8 i have realised the seller did a number on me. I initially thought it was something like a blocked rad or small hole some somewhere but alas its now confirmed as a head gasket. The seller is ignoring me now. Anyway I need to move on, I have a friend who is a good mechanic and has offered to help me out. I want some advice about what I should be replacing as a minimum and after looking on flea bay realised there are quite a few options, metal or composite ? Any heads up with brands I should be looking at or staying away from that matter ? I have read on the forums that new bolts are a must ?
Any help greatly apprieciated
Best Guy

Google dropped or slipped liner before buying anything.

Thanks so from what I can gather knowing what`s happening is not really possible until the thing is in bits ?

guy2bro said:

Thanks so from what I can gather knowing what`s happening is not really possible until the thing is in bits ?

Click to expand...

Not until the heads are off anyway.
You never know you might be lucky.

guy2bro said:

Thanks so from what I can gather knowing what`s happening is not really possible until the thing is in bits ?

Click to expand...

True, but a slipped liner makes a tapping sound as it reaches top or bottom or both ends of the cylinder, I did see a uTube vid once which recorded the sound and theres no mistaking it.

It appeared to be common with V8 engines overheating by running on barbecue gas.

As for your head gasket, whats wrong with getting the genuine part item.