Im running a WRC in my motor only becuse i had the motor in bits for a full rebild and when fitting a WRC gaskit your spost to have the head and block flashed over which is a lot more work and ££££ . my mate REX is running T34 .63 rear 30psi 409BHP and he is only running a Group A Gaskit . So its up to you Pete

Have done yours them mate