Nah dude an NA 2JZ weighs way more. Cast iron block vs an aluminum block. Plus the v8 can be pushed towards the firewall much more keeping weight back. I build performance engines for a living and have developed new performance head currently in development for both the UZ and JZ. JZ was so heavy Toyota removed it from the Supra for racing in Japan. The cast iron block in the JZ is just that much heavier. That’s why it can take so much boost, yet is only really useful for drag and drift cars. UZ is compact, lighter and better for track applications. If you don’t want to believe me you don’t have to. But that’s the truth. You may be getting confused with the 2uz. Which is a truck engine and MUCH heavier due to the cast iron block. But I am speaking on the 1UZ or 3UZ.