401 Flex plate Identity Crisis !

[ozziewynot]

Half way there . Yesterday a member helped to identify the harmonic balancer , now for the flex plate .

Looks like a 360 but hoping it's the 401.

Curious weight after the 12 O'Clock position I have not seen on 360 plates .

Markings " ZHT " " ZH 358 "

Thanks for your help .

[azpackrat]

401 plates for the TC-727 have a large counter weight, curved and about six inches long. Usually a Z indicates 401 application, the one I have for the T-400 401 app. is numbered ZH1379.

[Ristow]

401 T400 flex will have a rectangle shape weight welded onto the flap in the un-open "window".

[ozziewynot]

Additional clue is the three mounting holes for the torque converer indicate a T-400 trans therefore , an early flex plate .

If the " Z" designation applies to a 401 in this case , then the lack of a large counter weight becomes a question .

Does anyone else have a 401 plate with a Z followed by digits ?

Thanks