I am about to finish assembly of an rb-512 for a friend. This will be strictly street driven torque motor and I am thinking of using Mancini's (by harland sharp) roller rockers. It has a 246@50/548 solid from Dwayne, so spring pressures won't be too high. I am thinking these are probably the best choice on a budget. Any feedback on these or a better suggestion? Thanks, Lee.