727 in a 1966 dart wagon! HELP

86. As far as it looks, the early ones (86) had an UNLOCKING 1 wire 12V servo that disables the hydraulic pressure activated lock up (opens a bleed valve) when a part throttle kickdown from a locked up condition on police cars occurs. That was example I saw.

Thanks for all the replys!!!
So with the 1988 904 I can install a toggle switch between the servo to engage the lockup in any gear right?
See above, but why would you want to lock it up that early

So is the 1988 904 actually an a999?

Good question; I was believing that all lock-ups were 999s but recently was schooled the the lock-ups could be either;998 or 999.
In any case, I have seen the bellhouses cast with 998 and I think 999 on the upper drivers side with very large writing that cannot be seen unless the trans is out.Well I seem to remember seeing 1 or 2 nines from underneath using mirrors, for all the good that did,lol.
And finally you can grab the vin number off the RH panrail and look it up in a decoder book.

Ok but we have a situation now.
I'm wondering if 408,turbo, and 904 should be in the same combo. If the tires hook, she may be spitting out parts.I think I'd be leaning toward a souped up A904 or a 727.
Your combo really doesn't need or want the wide-ratio 998/999s and trying to find a lock-up TC to live is gonna be tough. Yeah, I imagine the 727 is the better idea