I don’t know if you know this or not, but the new rope seals are not like the old rope seals. The old rope seals were a asbestos based material, while the new rope seals are a Fiberglas graphite material and do not work anywhere near as well as the old rope seals. Failures are common. They just do not hold up. The neoprene seals were an improvement for the higher pressure later 56 and up 235 motors. So why are you going backwards here? Just asking of course. Your block can use the neoprene seal yet you want to use a less sturdy and less reliable new manufactured rope seal.
