I paid 100% in full and after 11 months got a full refund as we just felt like we could not wait any longer. Ended up with a World and with my little 800 hp mill all is well so far, just have to re-arrange the car a bit as with all the torque the 572 is providing and 100# off the nose it makes for a fun ride.......Good Luck to all who are awaiting orders and when I do build another motor I will try to get a KB first.