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Hi Jason,I stuck to the dimensions as per the drawing and it looks ok. The cylinder flange just shows in the inlet port, so I may just round off that part with a Dremel to provide a smooth gas flow in and out.Have you noticed, by the way, that there are no dimensions for the central cylinder head bore? Also, the holes for the manifold studs intersect two of the four vertical holes
You're over the hardest part now, with the cylinder liner hole made and faced.