Thermoquad 'beauty',

Also, the 6568 had the screw in small 1/8 NPT fuel filter that Ford used and then it was on a 460! Beware those mass rebuilt TQ's most always have a mismatch of components. I won't even look at a TQ if it has one of those little rebuilder stickers on it.
Yeah 9800x were universal fit 800 'Super Quad'.
The #6568 had increeeedibly lean sec jets, 0.098". Smaller than the pri jets, 0.101". Go figure how that works!! #2014 rods 069/054/040.

I am waiting for a special order 850 TQ from Summit. Recond, 6000 series & from memory it was under $200.