Mopar R1 block

IIRC .800 or .810" .
I’m not sure of the wheel size, but a buddy had the same roller lifter in his bracket car, a 340 demon 2600 pound with him in it, w2 heads roller cam a smidge smaller then what I’m running, for around a decade. Super reliable engine, and did no block mods to the oiling system to run in a stock block, ran low low 6s in the eighth mile.