Driving our Chev C60 2.5 ton truck today for work, POP, BANG, BOOM!! Get out, open the hood, the 5 month old Pro Comp HEI dist. I put in there last fall exploded!!! There was 1/4 of the cap missing, and one of the mechanical advance arms hanging out of the hole!!! The only thing I can think is that one of the studs that the advance arms pivot on broke, and the rest is history. I should have known better than to use any Pro Comp shit, but I got a really good deal on it last fall when our local speed shop was going out of business. I know a few guys that have had other Pro Comp parts fail, I don't know why I thought this would be any different? I guess I'll know better next time. Always remember that you get what you pay for. FUCK PRO COMP!!!!!!!!!!!!!!