Individual coilpacks / coil on plugs / COPs: Using the 4 individual coils from possibly a 1ZZ-FE or both of your NZ sequence engines this negates the need for just about any igniter(s), spark plug sales opportunities, distributor cap and a rotor button. The fourth-technology 4A-GE engine was developed from https://spencerpuszz.verybigblog.com/30801924/4age-blacktop-engine-for-sale-can-be-fun-for-anyone