Early style sb water pumps

Early Cast Iron water pump = 8 pounds

Late Aluminum water pump = 5.4 pounds

So, to change front cover, vibration damper, radiator, hoses, intake, and brackets for 2.6 pounds?
Think you're missing the point bro, I'm not trying to change a bunch of stuff. I'm building a motor from scratch and when it comes to buying stuff I would have rather had the option of buying an aluminum early style pump. That was the point I was trying to make how about them in the first place, that there is simply no one who makes the early style in aluminum.