Never mind on that last post. My speedometer was off and was reading low so when i corrected it it reads higher and is dead on. When my converter locks in at 65 to 70 mph im at 1500 rpms which seems about normal as my speedo was off by about 8 miles an hour before thats why it locked in at a lower ...

I have the same exact problem. With the factory settings my torque converter would lock up at 55 mph with light throttle and letting off the throttle slightly , and about 60 mph with steady throttle. Loaded the 87 economy tune and now the converter doesn't lock up until 70 mph with light throttle ...