Question about a 77 Blazer bucket seats going in a 72 c10
 

Recently got a deal on a set of 77 blazer highback
Buckets and want to cut them down to make them a lowback.
Does anyone have the dimensions of the back of a lowback 72.
I’m sure someone out there has to have cut down
A highback to make a lowback, the seat portion looks exactly the same.
Thankyou any help is greatly appreciated