Sourcing a cab for my 76 K5

[Damn_cajun]

Im in need of a doner roof and windshield frame for my 76 K5. I found a parts yard with a late 70s, early 80s cab but doesn't know for sure the year as it has no markings. Can I cut this roof at the B pillars and above the firewall to replace my roof and windshield??

 

[kennyw]

Pickup cabs are different where the top mounts to the K5 cab.

 

[kennyw]

https://www.facebook.com/marketplace/item/750915158737246/