That's the one of the major reasons I do t want to modify the VQ, after seeing how close parts are to the pulleys and things it just worries me. I'm not saying its a major issue, but for me it just puts limitations on things and worry.
Cooling will be compromised, yes you take steps to increase cooling, but for me its a bit more hassle to contend with.
Okay so an LS won't be free of issues but everything is on tap out the box. I don't have to worry about a built engine not being done correctly, cooling issues etc.
It's also different which for me is what I want to achieve.