Does anyone know the part number for sealed power ring kits standard size for a 4 liter just got some they were the moly set number e234k and didn't fit the expander ring wouldn't set back the whole way, hell it wouldn't even start in the gap. When we used the old expander the top oil ring fit but there was no room for the bottom oil ring. Went back to store and I've order a standard set not moly this time and hoping they will work, anyone have any thoughts why the moly set wouldn't fit.