You mentioned a 302 gmc. That's what I have with a Howard log manifold and fenton headers. The Howard can be run with 2, 3, or 5 carbs. Stromberg 97s have to be used when running 5. I'm not to good with posting pics, but if you pm me I may be able to send you some. Please note my 302 is not installed in my truck, so road tests are inconclusive. I do have the 302 on a run in stand and might be able to shoot a quick video of the motor running with the 5 97s. The motor is running on 2 primary carbs and 3 secondary or dumper carbs. I still need to make some adjustments, but all in all the motor is running as well, or even better than expectations.