318 1/8 time improvement

You definitely get a fuel pressure gauge and and see what you show. I can almost guarantee that your float height is too low but you don't want to correct it if you have too much fuel pressure. A rich bog is just as bad as a lean bog for your 60 foot times. If your pressure is too high, get a regulator before setting float height. Then proceed to tuning your carb. It almost certainly has to be idling off of the transfer slots and possibly the boosters. When you finally get to where you can set the floats, you probably need to go ahead and the 8"HG primary metering metering rod springs, I imagine you have at least 16 inches of vacuum at idle. You should go ahead and get accelerator pump nozzle squirter kit #1475 and calibration kit 1948. I'm using an Edelbrock combination line and pressure gauge from eBay EDELBROCK/CARTER FUEL LINE WITH 0-15 PSI GAUGE WHITE FACE #2199/5711 | eBay