with the 56a 5 speeds,i was always able to use the standard crossmember,though sometimes
i'd space down the the crossmember to level the gearbox.as the 5 speed is supposedly original fitment from a b210,the standard
crossmember will be the best go.with the 56a 5 speed,the minute you hear any bearing noise,get the bearings replaced,or it'll lock up the input shaft & destroy the cluster gear,etc.
you realise it's a 1 to 1 fifth gear.