I agree that the 461 "fuelie heads" are old school performance heads that will not be expected to perform with the modern stuff. Having said that, a well ported set of feulies will run pretty well. I had a set of 461s on a built 12:1 compression 383 with a solid flat tappet cam in a full weight 69 firebird street car and hit 115mph in the quarter on NO traction street tires.
My next motor (10:1 406, xe 274h cam, etc) used another set of redone "fuelies" and ran to 112 mph while being very streetable. Newer heads would have made more sense(performance and $ wise), but I like the old school bit. There is something about using real 60's hardware and being able to have respectable performance for a street car. It's all about what makes you happy.

George