Street Cruiser, Do I Need a Custom Torque Converter?

Worst case you could put a slant converter behind it but it should be okay.
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Keep in mind, leaning tower of power balanced differently than a 360. The 360 converter has either two small weights or one large tri-angle weight welded to the engine side of the converter. The 1968 and up 225 and 318 no weights, and there were two stalls from the factory. One about 1900-2000 stall the other around 2200-2300 stall.