Just received a Big Block Steering shaft that I purchased and it appears that the seller made a product switch. I wouldn't be too concerned except that the differences now make me wonder if it is correct or not. The bolt and slot are parallel with the flats of the shaft. Other pictures I have seen they are at 90 degrees. Also the two plastic shear pins seem much larger. Both are a little over a 1/4" in diameter. Is it a variation across years or am I way off base and all is well.Godspeed, Dan Solomon"It is a mistake to allow any mechanical object to realize you are in a hurry."http://www.freewebs.com/chevelles1970/

