408 Build Thread
What about using one of these? I think they call them speed nuts. NAPA has them in numerous different sizes/styles and the one on the lower right takes a #8 screw which is pretty small. You'd still have to be careful on the length so it doesn't puncture the radiator.
EDIT: I don't know why but I can't upload pictures today. The link is there but is dead. OK here's a link to pictures of them I found on the web
https://www.google.com/search?biw=1...source=og&sa=N&tab=wi&ei=TBkUVfTRG8WvggSljoEI