Yes. Have the origial valve guides lined with brass inserts and machine the guides for PC style teflon seals. Your machinist has to be careful and make sure there is sufficient clearance between the valve stem and the seal for some lubrication to the valve stems or they will seize. The bronze liners also hel;p with lubrication. I have been using this style seal on my 235 and 261 motors for 40 years or better.
