Y-Block? Why Not!

Randy and Tim inspect the Merc Y-block.

The engine is a 1956 Ford 312 Y-Block bored to 3.86” (.060” over). The crank is the 312, offset ground to 3.64”, for 2” rod bearings. The displacement is 340 cu. in. The custom rods are clearanced for cam clearance. ARP studs are used in the mains and heads, and ARP bolts in the rods. The pistons are milled flat, giving it an 8.4 :1 compression ratio. Heads are posted 471 castings, ported by John Mummert for supercharged applications. The cam is a Y-284S, with a duration of 284”, with 1.54 ratio rockers. The VR-57 Ford/McCullogh supercharger was rebuilt by Pat Fleischman, and the brackets, pulleys, bonnet front cover and water pump by Frank Rice of Rebop Castings. The supercharger is set up for 7lbs boost at 5000rpm. Custom machine work (bore alignment, over bore, decking, piston milling, head cc’ed, etc.), was accomplished by Cal Stewart at Stewart Machine in Renton, WA. Custom brackets by Dan Miller. Assembly by owner.

Mercury 312 Y-Block, right side. Mercury 312 Y-Block, with McCullogh supercharger.

Mercury 312 Y-Block, top front view. Mercury 312 Y-Block, top rear view.

Custom engine mount for Y-block. Custom engine mount for Y-block.

The front motor mount for the Mercury 312 Y-Block was custom made for this engine frame combination.

Frame motor mount point. Frame motor mount point.

A couple of photos of the frame mounting points for the front engine mounts.

Custom radiator shroud for Flex-a-lite fan. Fan shroud.

A custom built, brass, Mattson's Radiator and Flex-a-lite oil cooler & fan combo will be used to cool the Y-block motor. Here you can seen the custom fan shroud built to accomodate the fan.

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Hot Rods & Custom Stuff, 2324 Auto Park Way, Escondido, CA., 1-800-HOT-ROD-5.
(Note: "Vineyard Ave." has been changed to "Auto Park Way." Our address has changed, but not our physical location.)

Hot Rods & Custom Stuff - builds, restores, paints, services and sells parts for classic autos, cars, trucks and street rods.