LA Engine bolt sizes and count.

Is there a specific type of sealant I need for the head ? Or will locktight work ?

Regular Loctite is not a thread sealant. They do make one though, as does Permatex.

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This is what I use, just because I can get a good size tube for cheap at the Lowe's around the corner from me:
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I've also just used high-temp RTV with no problems as well. Like anything, pick your poison.