Stromburgs and Holley are both carbs, but they are different from each other, they are different makes. Just like Ford and Chev are both cars, but they are different, different makes. Is one better than the other? Depends who you talk to. Just like Chev and Ford. Is one better than the other? Depends who you talk to, and what they like. Stromburg seems to have a stronger demand right now, mainly because of the 'traditional rod owners' wanting them. They were the hot ticket back in the day, so the demand is there. Stromburg and Holley used the same bolt pattern on the base, but that's about it. One thing to watch for is the spacing of the carbs on the intake. If the carb spacing is real close on multi carb set up, Stromburgs will likely work, but the Holley's may interfere with each other. They are just a hair deeper from front to back. Not much, but just enough on some early intakes. Carb kits are available for Holley's with the newer seals and pump rubbers so todays fuel won't swell them up and cause a lot of grief. I paid 28.00 US each for the kits I got, an ebay find. The ECG carb you mention is just a Holley 94. There are 17 different carb models of the 94. Chandler-Grove was a big player in the early years building them for Ford. Holley received the contract later on, because of Henry Ford getting Holley to build them a few cents cheaper. Seems there was another manufacture or two, but I don't recall the name off the top of my head. The Holley has been around since the mid 30's to around 1958. It was used on a lot of the gas powered trucks back then Reo, International, GMC, and so on. After market carbs of the same design were used by the dune buggy crowd when it was a hot item in the 70's. Rebuilding is a simple deal, not much to them, but don't mix up the parts. The 17 different models have some differences, mainly internal parts. The swap meet find may be a mixture of what was left over on someone's bench, and sold as a complete carb. Try and get that to run right! I have a fair amount of info I've gathered up on the Holley. If your interested, PM your email address and I'll forward what I have. Offer open to anyone looking for the same info, just mention the Holley info so I know what your looking for. Sniper