who is running MRL (BAM) Lifters without lifter bore sleeves

famous bob said
The reason I asked was, I saw a lifter bore tube kit on ebay, that came with a bullet shaped peening tool to be driven down in the lifter bore to make room for the lifter. ''I assume. " ????

Yes Mopar performance sold that kit for many years.
They used to describe how to install it in the engine book.