You can make any quad good-as above mentioned. I had one on an old Buick 3.8L with the 4.1L 4-barrel intake. Had to rejet a bit- was jetted for a 307 Pontiac- and you REALLY have to tame the secondaries. Look for real lean secondary rods and leaner hangers and don't leave the spring adjustment loose. The 3.8L w/ a 350C turbo could average 26 mpg's hwy and had good bottom end. Some of the 2150's can be used on the 4.3L also. This is a good caburetor- esp. if the Quadrajet intimidates you.
Anyone w/ some carb background can do the 2150. For offroading, there's an extra spring on the float assembly which puts upwards pressure (a little) on the float so that the bowl stays about right. My ford 300 motor has a 2150 sideways on it. W/ the extra spring I've only been about 60 degrees w/ it w/o a sputter.
The quad, on my Dodge truck, also easily does this. Neither truck is for offroading though. These angles are from taking the kids to some remote swimming hole or collecting firewood.