You'd have to block the tires somehow unless you use a wrench that holds the yoke. If the yoke is free to turn, the truck will just move. It could even roll over chocks if you're reefing on the wrench hard enough. A piece of bar stock with a couple holes drilled to match bolts going into the yoke where the u-joints connect should do the trick. I have one that has a hole in the center for the socket and 4 holes to bolt to the yoke.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.