I noticed a new Y-Block Rear Main Seal Kit on Ebay that I have not seen before. Includes new Billett Steel Seal Retainer and either Neoprene or Rope type Seal for all 272, 292, 312 (2 different Kits). Seller claims part of the problem with Rear Main Seal leaks is distortion from age on the original Aluminum Housings. Item #'s are 262081318245 and 261880763668. Never seen this Item before. Any Opinions on is this a legitimate improvement over the original and would help solve the Leaks?