GM 6.6L is based on the small block. Ref link below
https://www.google.com/amp/gmauthority.com/blog/2019/02/gm-planning-new-engine-larger-than-new-6-6l-v8-l8t/amp/A small block will most likely never have the duty cycle of a big block...maybe if they spend tons and tons of $$$
Direct injection doesn’t have gasoline washing the intake port and EGR deposits won’t be washed away
Oil sprayed at the piston bottoms a nifty thermal metric
Still love my L29...but if GM comes out with a similar big block...WOW...just might get one