"...the number 46 casting on 360 hp 2 bbl 428s are often mistaken for number 48s!..."
So, you are saying that a 360hp 428 came from the factory with a 2 barrel carb ?
Surely you can't be serious. Where do you come up with all this stuff that nobody else knows ?
http://www.wallaceracing.com/enginesearch4.htm
http://www.classracerinfo.com/Engine...5&MAKE=Pontiac