Will these seats fit in my 70 Blazer?

[JWPOORE]

I am looking to upgrade to these seat and reinforce the floors, etc, but was wondering if they will fit because the owner said they were too big for his 72 pickup truck (not sure if he owns another brand truck besides a Chevy), but I think they will fit mine based on what others have posted on the board that look similiar to these seats.

If anyone could tell me what year these are from, that would be great too. Lastly , they are both powered and was wondering how difficult they are to hookup in a non-powered Blazer like I have.

Thanks for any help on this matter - Jim