[Zoomad75]

I've got a completely different solution. Get rid of the flex fan junk. Go back to a stock 5 or 7 bladed clutch fan. They work. It was designed for it to run inside the shroud you already have. The clutch fan in my K5 has ALWAYS kept the engine running cool. That's even in 105 degree heat creeping along in traffic. There was a lot of engineering thought put behind the design and use of clutch fans from GM when these trucks were new. Yeah, some of the ideas (like side saddle tanks) were not the best, but the fans work. It's one of the few things that hasn't changed as clutch fans are still coming on new GM trucks to this day.

It might be harder to get a correct clutch and fan in Europe, but it might be worth looking for.