I have a 14 l83 with a tsp dod delete kit along with .780 chromaly rods dual valve springs ls7 lfiters and trays amd a 227/235 cam with an 111° lobe speration angle no stock crank rods and pistons its paired with a 6l80 with a circle d 245mm 3400-3600 stall converter and upraded borg warner clutch packs and a billet intermidiate shaft and clutch hub wondering how we can get it past this 550 hp mark

 

CNC Ported heads and a C8 Vette intake would be my guess.