p61 western
ArboristSite Guru
Yep the thin spot is a good place to use your sealer of choice to ensure no leaks.Yes your 455 & 405 Plus has the extra tranfer cyl ports, The cyl base gasket is narrow 1/8" at this point, you may see it on the pic l sent earlier of a cyl. l think it is a weak area for possible leakage to ocurr.