i need help w/duster engine

do you have to go .600+ lift ..? I mean are you hung up on that lift..or are you ok with a more aggressive
roller that is as tall as your current solid cam..but holds the valves events better...
a similar car as your solid for instance in a roller will make more power than what you are now..
and you may or may not need to do a whole lot of modification.
sans springs, pushrods and such.? just a thought
cheapst.
by the way ..6.91 is pretty fast....how fast was your dragster?