I have been watching that one. I also inherited a 60 series box which if I can find someone to make a custom second gear will have ratios that equate to a mid-close box. I have the U/C 4 speed in the car now, my first event of the years is in 3 weeks so we shall see how much difference the change from mid to ultra close makes. I still gravitate towards using a more modern box but in talks with my fabricator but the price is a wash.