Purchasing a 1031 Replacement Property with seller financing

[Jason Mak]

There's a plethora of articles about how to use seller financing to sell a relinquished property, but I'm selling a property and would like to acquire a replacement property  with seller financing.  

In this case, would the seller financing be counted as mortgage boot?  Essentially, would the seller financing be considered a regular debt to count towards the exchange amount?

hoping @Bill Exeter or any pros can chime in here

Many thanks in advance for your help