(s13) rb20det ---> rb25det questions

[tetsuo41]

so ive got an rb20det in my s13 want to upgrade to an rb25det...

im pretty sure the rb20 trans will work fine with the bigger motor, anyone done this?

looking to find out if engine fitment is as simple as pull the 20 out and drop the 25 in? like same mount locations? im sure ill need random bits and pieces like hoses and some wiring, and i know some stuff from the 20 can be used on the 25, ive done some research but havnt found enough out.... is it worth all the trouble? theres nothing wrong with my current setup, but im about to grab splitfires and 550cc injectors, was gonna hold off and look into droppin an rb25 in unless its gonna be a retarded hassle...

links and realistic advice welcomed

also would like to know reliable places to grab these motors from (stateside, japan, canada, australia, etc.), aside from the nico marketplace

thanks