I have aquired a '78 230 with the stromberg 175 cd carb. It previously had a problem with an adjustment screw that is in the bottom of the float chamber. I think it adjusts something to do with the gas/air mixture. That origional one dropped out on the road never to be seen again. A very clever guy (my dad) machined a new one, having no luck finding a replacement. The car runs and I drove it from Souix Falls SD to Boise ID. It is however running rather rich and I can't seem to get it to thin out at all. My question is wether any one has successfully replaced the stromberg with an aftermarket job, and wether that makes sense?