anybody now if is possible mount the EA82 on my 1991 brat that is with the original EA81 .. but is in bad condition.. and repair is more expensive than buy an a new EA82

It is possible to put an EA-82 into a car that came with an EA-81. A lot of people will give you reasons not to do it, but if you need your car running, you need your car running.

some specific adaptation that i have to consider?

Yes, someone will chime in with what specifically, but if it came from a carbed model it should just drop in.

sorry, what you reffer with "carbed"..

it will bolt up the same. Use ea82 flywheel. Eliminate or re-locate the hill holder

 

Use ea82 exhaust header

 

You may have to clock the disty differently to clear the master cylinder.

 

you will have to figure out the electrical for the ea82 carb setup.

 

the ea81 manifold will fot the ea82, but some modification to the egr valve is necessart to fit around the bellhousing.

 

use an ea82 radiator

thanks, i will upload some photos when will be ready (i still don`t know i i will fix the EA81 or buy a used EA82 working).