Gears & Axles - 373 Swap and Rebuild

I have a 99 TA vert with stock rear 273 gears. We swaped in a rebuilt LS1 with ported heads and TV2 cam and rebuilt the A4 with 3000 stall. We are planning to swap the 273 gears for Motive 373 ring and pinion (2 series, G875373X), a rebuild kit (Ratech 3001K) with bearings and gaskets, as well as, solid pinion spacer (4111). Any suggedtions? Thanks in advance for any help!

someone correct me if im wrong but you dont NEED the solid spacer and can just use the crush sleeve since its an a4 and it wont be shocking the rear as much as an m6

Use the solid spacer