Hello. I bought an 86 Sierra 1500 with a 305 and a quadrajet just this past weekend and was investigating an automatic choke problem it has when I noticed the carb only has the front 2 bolts holding it down and the other the 2 rear holes don't line up to the intake. It is miserably cold outside so I was wondering what you guys could discern with this little info. It has an air pump and emissions equipment so I kind of doubt somebody tried to hotrod it, although someone did put chrome valve covers on it. I couldn't find a useful photo angle with all that emissions crap on it but I attached a photo nonetheless. PS. The goofy throttle return spring was held on with twist ties from a bag of bread, thought you guys might get a kick out of that.