Re: 1939-52 toploader behind a Y-block?
I have a BW overdrive in my '54 Merc 256 Y block, and it's basically the same as the ones used by all Ford products from '49 to '56, except that there were several tailshaft and rear mount position differences. These are not as tough as the later BW T85 R 11 units but plenty strong enough for almost any Y block. The front mounting bolt patterns are all the same, but you might have to match your clutch disc to the input spline of the tranny that you use. The hardest parts to find are the 12 volt solenoid and relay as the kickdown switch and governor are not voltage sensitive. Bruce
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