84-94 maximas had a vg30e FWD. This motor is the same as the 84-89 300zx non turbo motor but the 300zx is RWD. Both the motors in the 89-94 maxima and the motor in the 84-89 non turbo 300zx are SOHC 3.0 liter v6's with cast iron blocks and aluminum heads with timing belts. The 90-96 300zx has a vg30de(non turbo) or a vg30dett(twin turbo) which is a DOHC 3.0 liter v6 with cast iron block and aluminum heads with a timing belt. The 95-01 maxima had a vq30de which is still a DOHC 3.0 liter v6 but has a aluminum block and heads and has a timing chain not a belt.
I used to think that the 95-01 maxima's had the same motor as the 90-96 300zx but they don't. Very different. I always thought it would be cool to put a vg30dett into a 95-01 maxima. It still could be done and probably has just not as easy as I once thought. Hope this helps and good luck with your 300zx. They are fun but expensive. I own a 93 non-turbo. I love it.
-Homeless Ronald