18 spline A body 4 speed

The last two seen installed from Jamie at Passion had issues by members on this site . He use to be right up the road in Hazleton now he moved to a familiar suspension builder location above White haven Pa. Still close to me. But I use Brewers for all my 4 speed needs. My choice would be Dan from Brewers.

Do you need a 18 spline?. My choice would be a 247 1st gear 23 spline