E30 Zone

Apologies for more questions! Have tried the search function, but can't find what I'm looking for!!

How easy / expensive would it be to drop a 325 engine in my 320?

And what's needed? Presumably it's quite straight forward? The car has abs & mtec suspension already... Is there a massive difference between the two cars aside from the lump itself?

How much would a decent 325 engine set me back? Do I need the g/b too?

Any answers would be good!
Apologies as I'm sure all this has been asked 100times before! But 130something hp just isn't enough!!!!

engine/gearbox/diff and either the ecu or the chip from a 325 ecu into yours

thats about it as you have mtec susp

expect to pay from 150 to 250 for engine depending on miles history etc

gearbox £50 sport box £100/£150