Stop in for a cup of coffee

I'm not into it for any money, only my time so it's kinda win / win for me because I want to do it and would've probably done it for free because I have wanted a mechanical challenge. So him pretty much paying me with the other cars to do it is just an extra perk.

The engine has to come out and gone through and lightly modified, and put back In the car.

How hard is that, plus I will get familiar with something new.