![]() This was the low point for the 225.Īlthough the performance numbers took a hit due to the ever increasing emissions components being hung on the engine, the real reason for the apparent drop was a change in the rating of the engine from gross numbers to net numbers. By 1975, the 225 was rated at a meek net horsepower of 95 hp and torque of 170 lb-ft. As the emissions requirements on the internal combustion engine increased in the late 1960s and 1970s, the 225 was fitted with ever increasing power sapping emissions components, which hampered engine performance and drivability. The mundane everyday cast iron block and one-barrel carbureted 225 was initially rated at a gross horsepower of 145 hp and 215 lb-ft of torque. We also ran a 12-volt switched wire to the choke. ![]() Bottom Right:With the Carter BBD installed, the choke heating element was fastened into a cast well on the exhaust manifold. Bottom Left: We cleaned all the parts, and then using the original and new hardware, we mounted the intake manifold to the later model exhaust manifold. ![]() Additional components (not in photo) comprised of the entire kick-down linkage, all the clips and return springs, and the air filter housing and air filter element. Top: The parts for the swap included an exhaust manifold, an aluminum intake manifold, and a Carter BBD two-barrel carburetor. ![]()
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