OK guys, LOL, give me a break! I know a cast-iron intake and heads will practically give you a hernia taking them off of an engine. I may be off a little bit, However, the weight savings would be significant.
They're lighter if you take them off 1 piece at a time lol. The aluminum intake savings is about 25 pounds
Heads are about 20-25 pounds difference cast iron vs aluminum.
Small block heads are heavier than big block which is interesting