To my knowledge no four speed will be a direct fit, as 250 block is different to 3.9/4.0. You may be able to get an adapter plate kit. You may have control issues, ie TC lockup, etc.
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If you're not driving a manual you're really just steering.
You should be able to get a bell housing off castlemaines,
As far as control, you can use the ECU out of an EA Falcon to run the auto. The only addition would be a throttle position sensor, in order for it to properly kick down etc.
The speedo will not operate, due to it being mechanical.
Or what about a 4 speed AOD from usa, they use them in mustangs behind aussie sixes.
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