Help me identify my rear

[gcburdic]

I don't understand your question....sounds like you have a 70 rear end and you want to install 5 lug axles??...Is that correct? I'm sure others know, but to my understanding the 70 axle housings could be either a narrow or wider housing pending on its production date....the 67-70(early) were approximately 3/4" per side or 1.5" narrower than the 70(late)-72 rear ends....if by chance you have the later rear, you maybe able to swap in axles from a 71/72 truck or buy the ECE conversion axles or check with Moser(?)

So...please measure from backing plate to backing plate....this will help determine