what heat range plugs are those..looks fat to me

That was a good comment. Even the threads are almost totally black. I don't think it is pig rich, but the plugs are not getting hot enough to burn off all the deposits. Too cold of a plug is definitely safer than too hot, especially with a blower. I think I would try the same NGK plug but at least one heat range hotter.

number 6 heat range...

so number 7 heat range

In the NGK world the lower the # the hotter the plug, 7 is cooler than a 6

thease are 6 so i'll need 5...right

Don’t run a 5. Too hot.
A delco r42t or ngk 7 is typically preferred on mild supercharged engines.

You have some tuning issues.

I would do a compression test also, just to make sure nothing sizzled.

Also remember, as pointed out by Arcticfriends too…your ignition is from Procrap. I mean Procomp. Now speed shop inc ir something like that. The cheap of the cheap companies. Not saying it’s an issue now, but it could be. Keep it in back of your mind.

Im not going to advise on that, Im running 7's in my Whipple engines, someone else will chime in

ok..i'll buy 7 ngk plugs....i did the compresion test and i have 175 psi on all 8 cilindars..is that god for my set up...

yes thats good, God has nothing to do with it.......