thanks ddartdude,,,,funny that I cant find any info on them,,,just the stock 66 heads,,I've had others say bigger valves,,and others say no way,,,Hey moparlee,,,I just saw your question from last year about the dual quad set-up,,,never installed it yet,,,thats actually a "65" edelbrock dual quad with the different intake angle,,,on my 65 standard 273,,,not going to put it in the 66,,,rebuilding the 66 commando motor for that one,,,,the 65 is just sitting there,,,waiting for a home
