PRW rockers 273-360, 1.6 Ratio, with B3 racing relocation kit

j par said

Sorry about the comment in your for sale thread but I had no idea that that B3 racing relocation kit set the rocker shaft so far away...

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That is going to depend on the particular rocker, head, and valve height combo. The further away from stock combo dimensions, the bigger the move to correct geometry.
I've got the same rockers and have discussed correction with Mike at B3.