Depends which one is cheapest....
Nah just kidding.
This is a pretty tough question because all these units have plus points and negative points.
In the uk at least the 5v is an almost impossible unit to get cheaply or to even find, however if i could find one id have it just to take a look over but i think thats a little unlikely unless i have one shipped over, so for me its a toss up between the 1mz and 3vzfe.
Either of these will be capable of high outputs if treated in similar ways.
Manifolds on both are a p.o.s including the 1mz which has some wicked edges protruding into the gasflow from the ports....the 3vz's manifolds ( especially the rear bank) have two ports that virtually exhaust into each other, no wonder these engines are strangled.
Take off all the crap parts and replace them for superior ones and i dont think youd go far wrong with either of em.
Need a "stillonthefencesmiley".
