I was told by a head guy that if the pattern is off center a bit, you want that offset to be on the intake side, not the exhaust manifold side. Hope that makes sense. There is a great video on here about push-rod pattern.
https://www.youtube.com/watch?v=o5is9BsH5OU
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68 Firebird. IA2 block, 505 cu in, E-head, Solid roller 3650 weight. Reid TH400 4:11 gear. 29" slick.
Best so far 10.12@133 mph. 1.43 60 ft.
76 Trans am, TKX .81 o/d, 3.73 Moser rearend,
468 with KRE D-ports, Doug headers, 3" Exh.
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