Thanks for all the input.
Because it's an Auto, I set the timing at 6 degrees.
I adjusted the mixture screws to get it to idle smooth. (About 3 turns out each).
Then I connected manifold vacuum and i've adjusted the idle down to about 800rpm in Park.
ANOTHER thing i noticed is that the accelerator pedal, even though it hit the floor, only operated about 3/4 of the carby and wasn't bringing on the secondaries. (I've got them adjusted to come on a bit later).
Re adjusted that and once I get a new battery i'll be able to take it for a drive.

(Next job is to fix the backlash in the diff).