My 422 smallblock build

SSG_Karg said

Mechanical Roller Camshaft; 1964 - 2003 Chrysler 273, 340, 360 2800 to 6800 Howards Cams 712113-08 | Howards Cams
I installed it dot to dot and came up with 107.5 ICL. Moved it to the 2* advanced notch on the crank sprocket and came up with 104 ICL. Kinda wish it would have fallen somewhere in between but its probably splitting hairs. Howards wants it in at 104 so I left it there. The opening and closing events were about 1.5* off from the cam card.

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Ok, ran your numbers. Your cam is ground with 2 degrees advance in it. Why they want it 4 ahead I can’t say, but if it was me, I’d install it on a 106 ICL and let it dig.

FWIW, dot to dot doesn’t mean straight up. The cam key can be off, the crank key can be off, the key way in the cam and crank gear can be off, or some or all or none of that.

The mgispeedware.com cam program will show you where the ICL should be for an actual straight up install, and for your cam, that is a 106 ICL.