The 'magic' 0.777 multiplier in the MP book is only for MP cams, not production cams.
If the lifters in post #44 are the ones used with the cam pictured earlier, then they need re-facing. Lifters can be re-faced 2-3 times. I see Oregon cams gets mentioned a lot on this forum for lifter re-facing, with positive comments.
According to the Mopar Engines speed secrets catalog the 0.777 multiplier is for production cams and 0.850 is for the MP cams. This information is on page 143 of the above catalog. The part # for this catalog is P4452790.