Just a question, not arguing. I've always heard that a wide LSA (112?) is better when using exhaust manifolds. I understand advancing the cam to get the DCR up on a low compression engine but, why the tight LSA? Is it for a choppy idle?
Tighter LSA will increase your cranking compression. Hence why low compression cams have tight or tightish LSA's and are installed advanced.
In regards to wide LSA cams being good with manifolds, never heard that. Factory cams are typically cut with wider LSA's which help to improve idle quality, broaden the powerband etc. Most factory cars run iron manifolds.