i know that to use my old manifold on my LO3 heads, that i have to elongate some of the bolt holes. my question is, what holes need to be elongated and do they need to be elongated up or down? probably could have done a search, but i dont have time for the BS search system on here. so please, any help would be appreciated.

 

the center two holes on each side of the manifold. set the manifold on the heads, and look at the way the holes line up, it will be obvious what needs to be done.

 

thank you dewey, you always seem to have the answers im looking for. thanks again for taking the time to answer them.