I neet to get the fuse layout for the fuse box in a 72 240z. I have a blowen fuse and would like to know what it goes to before I replace the bad one to check for any problems.

I don't think there is any difference in any of the years of 240Z fuse layout within the fuse box .

The search engine is your friend. Typing in "Fuse layout" you'd find THIS thread.