The K20A3 just like the CRV/accord/factor k24a doesn't have a normal DOHC VTEC valvetrain as we understand it from the B-sequence engines - the K20A3 really should actually be known as a "DOHC i-VTEC-E" engine, because it uses a VTEC-E cam set up. For mechanical elements, it’s proposed you get https://elevemotors.com/product/jdm-honda-b16b-engine-for-sale/