Yes they take a special offset intake rocker.(I think the offset is .485 but someone on here will know for sure)

I would recommend Harland Sharps and they will have different ratios.

Wade Metzinger 918-809-0987
71 Cuda 9.28@145 -1s, Pglide
68 Cuda 10.64@124 1.45 60's 318->390 eddys
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