Mercruiser Bravo 1 Racing Drive Lower 1.26 Gear Ratio 1656-8865-0 High Speed Nose cone

Up for sale is a Mercruiser Bravo 1 Racing Drive Lower 1.26 Gear Ratio 1656-8865-0, I dont know much about this it came on a pallet with a bunch of old Speedmaster Volvo Racing equipment I purchased.  This is what I can tell you about it, It Turns Flawlessly, The Prop Shaft is straight ,  it has a high speed nose cone , I dont see any obvious problems with it I do notice that the vertical shaft has about 1/4 inch end Play , I dont know if thats normal or not .  This unit is Sold as Is As described  with no warrantees expressed or implied . I nothing about Mercruiser stuff.