Need someone to check my work

[Jstock85]

I’m wanting to put this distribution block on my fire wall in place of the old one. This is s stuff that I already have and before I go buy anything else and may or may not need I just need some with more exp than me to grade my work before I install anything.

1985 c10 4.8/th 350 is my setup

My 2 concerns: will the 10 awg work with the 8awg wire and will that 40 amp fuse do the job?

Coming off that block will be the main block wire and the battery + for the pcm.

In the future I’d like to and relays for power locks and windows to that block as well.
Thanks for any help/advice
Jeff