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  1. The 1947 Cadillac had a 346 cubic inch V8 side-valve engine design. This engine design is often referred to as a “flathead” design. This engine produced 150 horsepower. These were not fast cars as the 0 to 60 miles per hour time apparently was about 15 seconds.
    stevemckelvie.wordpress.com/2012/07/10/the-194…
    In its pricier Series 70/75 models Cadillac went to a 346-cid V8 based on the 322-cid version. It had a 3-1/2 in. bore, 135 hp at 3400 rpm and 170 lbs.-ft. at 1000 rpm. Cadillac kept the 346-cid V8 until 1949, when a compact, but very sturdy, overhead valve V8 with five main-bearings arrived.
    www.enginebuildermag.com/2014/03/vintage-v8s-e…
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  10. 1939 Cadillac 346 1G V8 Flathead : r/EngineBuilding

    Non-crossflow heads on a V engine will do that. Unless it was designed with the valves on the outside of the block, in which case you would have two intake manifolds, as well as two exhaust manifolds to dick around with.

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    Sep 3, 2017 · The 346ci sidevalve Caddy V8 might look kinda crazy with the exhaust ports up the top of the engine but the design keeps the hot exhaust gases away from the coolant passages, a problem that plagues traditional …

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