Mercury Muscle Cars — Not the 60s — How About the 50s!

Mercury was involved in racing from 1956–1958. The M-Series engines were very competitive. Here’s a recently rebuilt 1957 368 CID Mercury M-335 returned to its original habitat, a 1957 Mercury Voyager station wagon!

Marauder, Cyclone, Caliente. They might be names you know, but are you aware of the M-260, the M-335 and the M-400?

Probably not, but you should be. Mercury’s performance program started back in 1956 when the Y-Block V-8 was still in its infancy, but stock car racing was hot and heavy. While I won’t focus on it here, that was the first year Mercury offered a hotter than hot option for those wanting to go get ’em in USAC and NASCAR. Called the “Mercury M-260 Optional OHV V-8”.

Here’s the specs: Cast iron block. Displacement: 312 CID. Bore and stroke: 3.80" x 3.44". Compression ratio: 10.00:1. Horsepower: 260 @ 5000 RPM. Torque: 345 @ 2800 RPM. Carburetors: Two Holley 4000 four-barrels.

The M-260 was competitive, but that was in the lighter Ford/Mercury chassis used from 52–56. The boys at FoMoCo’s second level knew that the ’57 and ’58 chassis were now going to be based on the Lincoln line, so more get up and go was going to be needed.

What was the answer? Well, now that they were Lincoln-based, they had access to the Lincoln V-8. Before you go, “oh, that’s great use a luxo-barge V-8 in competition” we should remember that the Lincoln mill powered Lincolns to 3 consecutive Pan American Road race wins — and each time placing at least two cars in the top three!