I used tie down straps and secured a tripod in the back seat area. I aimed the 8 mm Sony handycam at the speedometer and tachometer so I could get a good zero to 60 time measurements by timing the tape after I got back home. This is an old racer's trick from way back. They used to aim a movie camera at the instruments so they could review readings after a  race. It's much easier than trying to remember readings while your driving. Now, with video tape, I can go back home and watch it right away. (a major improvement over the old movie cameras) 

If you decide to suffer through the 5 minute (56k modem) 1.6 meg WAV file download, you'll hear a cross between a heavy truck tranny winding up, and a NASCAR sounding engine spinning it. In the sound file, you will here it take off from a dead stop, run up to 30 MPH in 2nd, then shift to 3rd and run up to 60 MPH. I ran up to about 70 after hitting 4th. The old 4-speed isn't exactly the fastest shifting box, but at least it can handle the torque of getting 5,600 pounds of Suburban up to speed without splitting in half. The SM-420's wide gear splits don't help either, as the Saginaw it used to have is a close ratio tranny. I wonder what this 'Burb would do with an Automatic? Hmmmm. 

The last two photos were somewhat blurred due to vibration at speed. The deserted back road I used was only about 2 miles long, or I would have taken her to 100 plus. I didn't have enough road to get going that fast before running out of room, and plunging into the Columbia river. 

It used to be faster, but I pulled the fast shifting 3-speed Saginaw box out and replaced it with the 4-speed. Despite the extreme sounds in the wav file, I wasn't going crazy with it, as I shifted it easy, and didn't force feed it. The engine will also run to an easy 5,500, but I try to limit shifts to 4,000 RPM. The farther apart an engine rebuild... the better. I also didn't side step the clutch, because I'm still running wintertime studs. No sense flinging them all out of the rubber! Not only that, but with 3,050 lb. rear axle weight, something will break (U-joint?) before the rear tires will slip on dry pavement. However, it does make for getting crammed back into the seat!