Hello all, brand new to these forums. I have an 81 Brat with a bit of an engine problem. I was dumb and let a buddy of mine drive it, and he ran it out of oil. Now I need to replace the engine. I'd like to get some more power, but I'm unsure if any other Subaru engines will bolt up to the stock trans. Any info at all would be greatly appreciated. Thanks!

I have an ea81 with trans that runs great for sale. I am putting an er27 in its spot.

basically you can make any Subaru engine fit into that Brat. My advise, for easiest installation and drop in, you might want to get another EA81. Since yours has whats known as the top mounted starter (starter on top of the bellhousing), you'll need to swap the bellhousing from your original engine to anotherEA81 you put into it. You can use a side mounted EA81 (starter mounted on the driver side of the bellhousing) and it will directly bolt into the car. You can then put a Weber carburator onto it, a better flowing exhaust, hotter ignition setup, plus lots of other little mods to help increase the power output of the engine.

Thanks for the replies. I was thinking of maybe swapping in an EJ22, but I'd need an adaptor ring. Anyone able to tell me where to pick one up and what the cost is? Thanks.