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so ive got a z6 that i was planning on building. i was told by my buddy that a y8 head is a better head to go with for a build than a z6 is. is this true? i was told by another friend of mine that the only difference is in the cam. and then that means i screwed up.also what would be the cheapest most reliable way to go boost. i know typically ud go for forged but is there like another factory set i could get that would handle, say 10-15 lbs, that would b good to go with keeping reliability to about 50 to 75k till the next rebuild? sorry if im not making any sence but xD. trying to get the most bang for my buck. i know stock will handle it but im worried about how it would hold up under this and dont wanta find out first hand