I can't speak to the 46 model truck but the driveshaft from the shortbed S10 pickup was a near perfect fit for the AD truck using a Camaro diff. The S10 SB will have the correct yoke and the U-joint bolted up to the Camaro pinion yoke. On the AD truck moving the diff 1/2" to the rear helps center the wheel in the wheelwell and eliminates the need to modify the stock S10 shortbed driveshaft. This may or may not help you with your setup but the S10 driveshafts are plentiful, cheap and will have the correct yoke and U-joint. You may get lucky.

Be sure to have the weight of the truck on the rear wheels when you fit or measure for the driveshaft. There shouldn't be any "slop" in the yoke when the driveshaft is in place.

Dave



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