vq35de's difference

[Zriuz]

alright i just got my hand on z33 transmission just because i'm a big car part hustler in town so i just buy stuff even if i won't use it if they are at good prices, to resell.

i do own a s13 so i just tho about vq35 swap, i'm currently running an sr but just got the urge of doing a vq swap

can anybody explain the difference between the altima, maxima and z33 vq..?? besides the obvious intake, compression and exhaust... and the difference in years and the valve timing system it uses.

i'm mad cheap so i'm trying to use the FWD version with a megasquirt. i know my way around fabrication so please avoid telling me to seek professional help.

i been searching and cant find anything about the variable valve system.

is it on and off like v-tec, or more like a cam degree adjustment like i-vtec (sorry for the honda comparison) trying to figure out since megasquirt can only control the on and off type. any info will be great.