Displacement -- Bore x Stroke:
 
5.0L = 96.5 x 85.0 (stock 500E)
5.6L = 96.5 x 94.8 (5.0 block with M117 crank)
5.8L = 96.5 x 100 (5.0 block with Brabus crank)
6.0L = 100 x 94.8 (AMG & RENNtech standard stroker motor)
6.2L = 102 x 94.8 (RENNtech)
6.3L = 100 x 100 (???)
6.4L = 101 x 100 (Brabus, badged as "6.5")



M119.974 AMG 6.0L engine:
 
HWA-119-030-03-20 = connecting rod, approx $400 EUR each
HWA-119-030-09-18 = piston, pin, & rings.... approx $800 EUR each
HWA-119-016-18-20 and HWA1190162020 head gaskets for a mere $700 EUR each. 
HWA-119-030-03-01 crankshaft is a paltry $6700 EUR



116.96x 4.2L connecting rod length = 138.00 mm
117.96x 5.6L connecting rod length = 154.50 mm
119.960 5.0L connecting rod length = 154.50 mm
119.97x 5.0L connecting rod length = 149.00 mm
119.97x 6.0L connecting rod length = ???