What does it normally run MPH wise? 60' is almost all in the squirters, your jetting is in the MPH. 7 sizes is a LOT...sounds like you might be lean now if it isn't pulling hard. What is your jetting and HSAB? Have you checked a plug, or do you have a wideband to tell the air/fuel ratio?

67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....