Been through the RMS hassles too many times. Originally after the first build (1983 - first time I owned a Pontiac so I spun main bearings before I knew about the lower rpm 455 LOL) still using the rope, but it worked great for years until it didn't so that was okay by me. More recently (2010) I (the shop) used the BOP Viton RMS02 and it leaked. They did that pull the pan short cut and not only was it frustrating to deal with this idea, it didn't work very well. Had a shop experienced with this do it again (2012) to fix the leak, and also on the next build in 2020 and again both used the BOP Viton RMS02 and all four rotation holes were filled with silicone). No problems since the last two times, and after so many years of a runny nose RMS it sure feels good.
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