I have been conversing with numerous parties in Europe about the development of an improved Opel CIH valvetrain. This is not for the faint of heart (or wallet), but is for serious high performance use or racing. Essentially, about six of us are working on a project to allow the use of roller rocker arms, roller lifters, and a billet roller camshaft in a CIH Opel engine. We are interested in the benefits of a nearly bulletproof valvetrain, with greater rpm potential, greater torque and power, and less component wear. If anyone is interested in this, please contact me, I am trying to establish a quantity of potential buyers to help baseline a buy-in for the custom-made components. A rough guesstimate on the pricing is $1400-1800 for a cam/lifters/rocker arms/stud girdle. Thanks.