Most B series are interchangeable with very minor modifications, A B16A, B18C, B18C type R head can be mixed and matched across B16A, b18C, B18C Type R, B20 blocks.. That was the beauty of the the B series engine from Honda, a legend in its own right and still very much competitive after more than 15 years. Totally agree, hence why I love those engines to bits lol, originally an Ozhonda member owned a 4th Gen Prelude with a H22A, another car I loved to bits litrally, hahaha! lets just say its falling apart now -.- I drove my mates H22A powered EG last nite!! Woooooo... its LOCO!!!! LOVE IT!!!