NEW 700r question

[PHAT TONY]

My plans for the truck in question are to keep it as stock as possible; std steer, std brakes, 307 2bbl. It's a 3spd std with 3:73 gears, I'm installing 700r4, tilt auto column and tach dash cluster and a pile of rally wheels. I saw this B&M gadget in a Summit catalogue; it goes in line at speedo cable on trans, works with mech. speedos and simply has an adjustable speed switch that locks/un locks converter in the 30-90 mph range. You power it, plug it into the tranny, set it and go. The engine stalling on hard braking won't affect std brakes/steering. I may use a different set up in a GMC Sierra Grande Longhorn that I'll prolly turn into a shorty half ton.