rico-ej2.5

i have a 95 awd 2.2 impreza and it has 205k so its time for a rebuild i thought of a swap for a 2.5 but after doing some research i found it has a pritty good chance of failing (detination) so instead im looking to get a top end kit cam, heads, rod, ect. any were i should look first???

i also hered i could put a ej2.5 crank in the 2.2 to get a 2.3..true??

one last thing if i change my top end will this kill my emissions???