The exhaust flange that will mate with the rest of the exhaust system can be seen inside what used to be part of the original footwell. Duplicating this mod on the drivers side is going to be a challenge as the position of the modified rail fouls the original stearing column path. I think the Alternator position will have to be looked at.
As you can see from this shot. To get that engine to sit down, the bit of chassis under the sump wing will have to go. The lower chassis side rail has been removed as a new 'clip' is to be positioned in the space that that hole provides and will be mated with the revised chassis. And then I got to figure out how to sit the engine on something. The engine mount position is behind the manifold!