In my experience, there is no such thing as an inexpensive throttle body kit (that has just been my experience). Although, I've known people can find a bargain at anything. That being said, I have known people who found a later model vehicle with the same engine and transfer the parts over. But either way it's a ton of work. In my opinion it's just easier and cheaper to rebuild the carb. A rebuild kit is around 25 bucks and in this case qjets can be picked up at junkyards for 30 bucks all day long. I've never had much of a problem with fuel smell from qjets. Or possibly I'm just very used to it. I don't think there be any real benefits swapping to throttle body. Q-jets are very fuel efficient thanks to the small primaries and large secondaries. That's the beauty of them, it will run less fuel when your not dogging it, and when you want to the secondaries open up and act like a true 4 barrel. I've had a qjet on a built 350 that ran just as strong as a Holley double pumper, but I had better "getting around" gas mileage. That's just my opinion. I just like these carbs. Plenty of people hate them, I just don't think they have had a good tune.