Ok, I've got an early '74 260Z, stock, with the dreaded flat-top Hitachis. They've been sitting forever, so they're gummed up and don't really even work. I went to a local salvage yard, and asked if they had any Datsun carbs, and the guy gives me a pair of carbs, with manifold, that (being the newbie I am) I thought were round tops. It turns out that they are actually Stromberg 175 CD-2 SE carbs, mounted on what looks like a Datsun intake manifold, although I've yet to be able to verify that 100%. My question is, how do these Strombergs compare to the SU's, either flat or round top? Should I even mess with them, or should I take them back to the guy and tell them they're not the right carbs for my car? Will they even work? Any help on this would be GREATLY appreciated....