Performance lock up 727

I've rebuilt so many 727's over the past 30 yrs. I can't even recall how many it was but in that time I have yet to even see a lockup model. I know they exist, just haven't seen one. Even in spite of not seeing one it'd surprise me if there is a big diff. between the strength of it vs. a non lockup so I'd say yes it's very possible to build one to withstand some torture and a mpg. increase should be possible using one. The only thing is you'll probably notice a perf. lockup converter will cost more than a non lockup verter and you won't find one on every street corner like you do with a non lockup verter. With that said here are some things I've found over the yrs.. Do not use a 5 to 1 kd lever. They were designed for the wider band for a hemi trans. that required more leverage to apply it. Nearly every time I've seen a 5 to 1 band used the trans. has some overlap on the 2-3 shift. I use a 3.8 or 4.2 lever in the ones I do. There are several factors that actually determine what ratio lever to use. The type of band (solid or flex), the # of return springs in the front clutch pack, the type of front servo, the clutch pack clearance, # of springs in the accumulator or if it is blocked, and the hole diameters in the valve body transfer plate. If you want to be safe (as in no overlap) use a 3.8 lever. There is very little difference in how hard 2nd gear will hit using the lower ratio lever. Also double check to see if the Trans-go kit will work in a lockup VB. If you have a 4 clutch front drum, which yours probably is, you can use 5 thin clutches designed for the rear clutch pack. Just make sure to check and adjust the clearance to achieve .060"~.075" clearance.