GEC52: I do not know (I'm honest) about 51 1/2 but my 59 because of the post pins (bolts thru top and bottom) my local tire shop couldn't get them. So I ordered off of Brothers and suprize I got Delco shocks, pins, the whole works. Look really nice especially w/ polished stainless nuts and washers smile I added. popcorn The Truth is Out There (Good Luck)