Do you still habe the power valves in it? If so try reducing both of the power valve restriction channels down by bushing them and then enlarge it to what size you want I had one of those 8896-1 and sold it after having the front metering block modified by the carb shop and blocking off the rear power valve while testing that carb on a motor on the Carb shsop owners DTS engine dyno In retrospect I could have bushed both PVRC and enlarge them back to .035 to .050 while usig the wide ban as a guide on the dyno Live and learn That carb and another custom built (very expensive )1050 dominator made me end up liking the stock 9375 non HP 1050 Domintors so much