Metering Blocks? What is the model # for your carb? 9375, 8896, 8082, or? An 8082 is a two circuit Dominator and it's possible to have the same casting #'s on the blocks. If you bought it used, it may also be a carb converted to 2-circuit. Dominators have a nasty habit of being rich in the low and midrange, lean up top. This is why a few people have converted them to 2-circuit. I did my 1250 this way and works great. Here is some reading, not for the faint of mind.
http://speedtalk.com/forum/viewtopic.php?t=9934
http://www.motorsportsvillage.com/fo...pic.php?t=3283
http://www.motorsportsvillage.com/fo...pic.php?t=3742
http://www.motorsportsvillage.com/fo...pic.php?t=3811