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

512Stroker said

The Comp retrofit hyd rollers are also long enough that you must remove the heads to install them, even in a factory stock lifter bore.

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Yes but in your case it is because the lifters are long, in my case it is because the bushings are tall. Not enough room to swing the lifter into position. Either deal is a pain though lol.