12 Bolt 40 spline spool

[Mark Markow]

I don't think it would sell that well, in order to use the 40 spline spool, you need at least 3.250 bore housing. those are only available in a new aftermarket housings. the stock housings are 3.062 bore, . secondly the 40 spline I.d. on a 3.250 o.d. on the bearing is marginal for strength , thirdly if a 35 spline axle isn't enough for your application, you should be looking at a dana 60 or 9'' in my opinion.