[alt63bird]

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I just happen to be knee-deep in researching the topic of Warner Gear cast-iron FX/MX/LX automatic transmission usage in '50s-'70s Ford/Merc/Lincoln/Truck lines. As noted above, 410s in '67 only used the C6. PGA- and PGB- are C6's and have several suffixes depending on engine (390, 410 or 428).

For reference, '67 390-2v w/ MX COM - PFA-B (column shift) - only listing in '65-'72 Mercury MPC-Final Issue for MX in full-size Merc. '67 Canadian Meteor (full-size) used MX dual-range transmissions PFA-B (390) and PFA-E (289) - both column shift versions. FX version (single-range) was used behind 289 with column shift in fleet applications (think rental cars, for instance). The MX COM was last used in '68 Meteors with 240-I6s and 302s with column shift - from '69-forward the FMX (short case) was used in various lines, mostly behind 351Ws and 351Ms if I'm reading things correctly.