My opinion is that at qjet is one of the best carbs ever made. Yours has lasted since 1972, that says something. While the edelbrock is also an excellent choice, I still think you will be happy with a properly rebuilt and tuned qjet. ( I even put one on my mopar, the purists would cringe.)

I have never had any trouble with lifter bleed down on a stock SBC if after adjusting them (before cranking the engine)
Good luck.