I used Hemi +0.100 rods with off the shelf 1.32 high pistons and a 383 forged crank in a 400 block. It was an off the shelf way to build a high compression 400 back before kits were available. It did work pretty well, that engine made around 600 hp with Porter Racing Head Edelbrock heads. It was a in daily driver Duster that went 10.90 on street tires with full exhaust, full interior, etc. The guy used to drive it to work.