Is your P3 slot or socket?
I have a slot P3 600E that ran @800 (133 FSB, 1.65V) for 5 months straight with a GlobalWIN VGS08H cooler and arctic silver. I just took it (amazing) to a gig over the weekend (167 FSB, 1.85V). The VGS08H seems to be holding okay but it is one of the models that uses a thinner HS but has 2, 6000 RPM fans on it (so that the whole thing doesn't block too many of the DIMM slots). It fit okay in my BE6-2 (I think blocking only the closest DIMM slot) but I was considering a bigger unit to handle this latest OC. I'll need to measure so that it doesn't block the entire bank...