Need some help with torque converter lock up kit. There is the painless kit witch reads like this

Now you can control the lock-up function on your 700R4 overdrive transmission with your carbureted engine and not have to buy any expensive computer. With this easy to install lock-up kit you don't need the computer or speed sensor. A vacuum controlled switch and a 4th gear pressure switch/lock up solenoid combination controls the lockup. Kit comes complete with everything to complete the installation including a new pan gasket.

The GM performance kit

Adapts the 4L60 or 700R4 automatic transmission (non-electronic version) for use in early-model vehicles, with or without an engine management computer. Kit includes instruction sheet, throttle valve spring for carbureted engines, a normally-closed fourth-gear clutch switch and wiring connector for the torque converter.

And the B&M

Operate your vehicle as a standard type torque converter when it is more desirable than the lockup type. The Powerswitch kit supplied for these transmissions only locks out the converter in first through third gear. The TH700-R4 and the TH2004R will not function properly with the lock-up converter locked out in fourth gear. The Powerswitch kit automatically overrides the switch in fourth gear in overdrive transmissions.

Do all of then do the same thing and what one is the best? Or is the another better lock up kit out ?

Thanks

I was going to post the same thing yesterday,but wasn't sure if HK 350 2233
wanted to go that way.
Brett helped me out on that one when i went the T700R4 way.
His way of by-passing the temp switch is the best way i think as it locks the TCC only in 4th