Does anyone happen to know how much each of these engines (long block) weigh??

 

Its physically the same and the weight is pretty much similar. The 3uz is basicaly a bored out 1uz, that has weaker rods to balance the new weight of the piston. Bad choice in my eye, if you ever want to go fi, i've even heard of the 3uz blowing at only 6psi. That was probably just from a ill installed kit though.

 

your name is hillarious btw. Is this motor lighter than the 2jz?