model a spindle and brake swap

new to the h.a.m.b....this has probably been answered but is the 40 ford spindle a direct swap to the 28-29 ? i've read the info on modifying backing plates and drums with spacers and redrilling holes,but speedway lists 40 spindles/kingpins as replacements and i need more info?any help's appreciated;buzz.

 

I need an answer to this too. Anyone have any info this.
Thanks,
Phil

 

Post it on the big board.