How To Identify Classic Ford V-8 Engines - Demystifying Displacement

One final look at another FE clearly shows how the valve-cover railing is divided between the cylinder head and intake manifold, another uniquely FE characteristic. This engine build used a Carroll Shelby aluminum block, which employs four cross bolts per main cap rather than the two used on the stock block.

This assembled 385-series big-block shows the engine to be a sizeable package. There is enough room inside the block to open the engine up to over 500 cubic inches. Note here that the valve covers fit the cylinder head directly and do not attach to the intake manifold like the FE. Like the Cleveland engine, the water outlet is vertical, but the thermostat housing attaches to the intake manifold rather than to the cylinder block. The assembled dimensions for the 429-460 are 34Lx27Wx30H.

Moving onto the 385-series big-block engine it's easy to see the extra beefy casting characteristics that make this engine the brute of the family. Distinguishing the 385-series block from an FE is easy. Unlike the FE, the 385-series engine has the crankshaft centerline even with the oil pan rail. The deep skirt at the bottom of the block on an FE is absent on the 385-series engine.

If you're looking at a Boss 429 there's no mistaking it with a regular 385-series engine. Although based on 385-series architecture, the four-bolt block and NASCAR intended cylinder heads with very distinctive valve covers make the Boss 429 more of a close cousin than just another 385-series big-block. The Boss 429 is bigger than a conventional 385 series with dimensions of 34Lx30Wx30H.

This close up of a 385-series exhaust port shows another characteristic of all standard 429 and 460 cubic inch engines. The exhaust manifold attachment points are not equidistant from the edge of the exhaust port. The lefthand bolt hole is twice the distance from the edge of the port when compared to the righthand hole.

Aside from their enormous size, another way to recognize 385-series cylinder heads is the splayed valve arrangement where the valve angle varies from the vertical, noticeably in a fashion similar to the 335-series Cleveland engine. Like these aftermarket heads, stock cast iron 385-series heads also have cavernous intake ports and a seven-bolt pattern on the valve covers.

Another interesting engine you might encounter in your classic Ford travels is the venerable Y-block from the early Thunderbird days. Offered in displacements of 292 and 312 cubic inches, the Y-block is different in many ways from other Ford V-8 engines. The most obvious characteristics of a Y-block are the Siamese exhaust ports on the center two cylinders and the rear-mounted distributor. Although this is the last Ford V-8 to feature this arrangement, other manufacturers have had some success with it. Another Y-block-only characteristic is the two-bolt valve cover retention arrangement where two long retaining bolts enter the cylinder heads directly through the top of the valve cover.

Here's a closer look at the 312 Y-block engine. It's the only Ford V-8 where the intake ports are laid on their side and stacked one on top of the other. The intake manifold requires both bolts and cast washers for retention. Unlike other Ford V-8 engines, because the intake manifold has open runners, the engine requires a separate steel lifter-valley cover.