prob. with my 76' maro

[brutisrazutis]

i have a 76 maro with a 350. i have a set of edelbrock aluminum heads a weiand 142 cid blower with a holly 750 vaccume seconday advance carb. well i adjusted my roller rockers by backing them off till i hear them knock then tighten them till the knocking stops. then a quarter turn more. and tighten down the allen head lock screw. well i drive it around and all is good, but as soon as i give er hell down the street and then back out of it then everytime i accelerate after that my valves start knocking again. so i re adjusted twice more, and i felt good and then sure enough they started knocking again. what is causing this and how do i fix it? ummm its usually just the #4 intake and the #6 exhaust valve knocking. im guessing its just the roller rocker lock nuts are bad on those two valves. would rocker arm girdles fix this problem? any help would be greatly appreciated.

thank you,

brutis