The only engines I can find in stock on a few websites like Summit, MoparPartsGiant, or MoparOnlinePerformance are the stroked short blocks and a drag pak 5.9.
P5153909 Block, Short Assembly, 4.040" Bore, 4.000" Stroke, 410 "LA", Stroker 340
P5153910 Block, Short Assembly, 4.185" Bore...