190e Cosworth question?

[Das Benz]

Hey folks.

I have a quick question for some of the w201 pros on the site.
So first long story short, one of my good friends had gotten the benz bug after seeing and being around my 2 w126's. But hes wants to lean towards something more youthful.

Ive helped him narrow down his choices to a w201 car. He really wants a evo 2 but that's not in the cards just yet for him. lol. So I came across a 87 190e cosworth for sale locally, which in my opinon should take the upgrades that he would like to do, and be a very good 2nd summer driving car.

The question I have, and I just want to verify. The cosworth cars never came with the 2.6 correct? just the 2.3 and 2.5's?. This car looks to be a legit cosworth model (the gold coloured model with the full cosworth skirt and fender flares, automatic though.), however it has a 2.6 installed. Im assuming that someone did an engine swap.?
We plan to go down and have a good look at the car on sunday. Any pointers or tips. I know the w126's inside and out, but the w201's are a whole new game for me.

Thanks for any tips