The part #'s 50 and 100 is what several of us have used on the BX, just bolt part # 100 to the front plate between the TPH arms and slot the end of part #50 and bolt to the tab on the inside of the TPH arms, when I did mine the cost of the four pieces was about $60.
Here's a picture of one set up with just the four parts.
http://www.tractorbynet.com/forums/...200-lift-arm-adjusters-5-206645-bx3ptmods.jpg
