The MEL (Mercury Edsel Lincoln) engine series ran from 1958-1968 in 383-410-430-462 CID sizes. The MEL has a 4.90 bore spacing, and a 4.325 stroke aftermarket crank was available. The MEL has a deep skirt engine block like the Y-block and the FE, and the MEL has an angled block deck surface with flat faced cylinder heads like the 401-477-534 Ford Super Duty and the Chevy W series 348-409. As part of the Retro Engines Program, I suggested that Ford offer a MEL crate engine with the 534 Super Duty bore and stroke. 534 MEL specs : 4.50 bore x 4.20 stroke, 2.25 intake valve, 1.875 exhaust valve, 1.75 piston compression ht, 0.010 deck clearance, 7.14 con rod length (1.70 rod ratio), 11.00 block deck ht. 534 MEL features : forged pistons, billet or forged con rods with oil hole up the beam for the pin and 7/16 cap screw rod bolts, billet or forged crank, cross-bolted main bearing caps. I encourage any of you who want to see Ford come out with the 534 MEL to contact them at www.fordnewideas.com