Hey everyone

I would like to combine two objects in maya. Though some of the parts wont be visible anymore when im done so i would have to delete those and bridge or merge the objects. but these objects have quite alot of polygons so i was wondering if there is an easyer way to combine them.
I have a robot and a human body and i want to combine them in a way that some part stick out and some dont so its like a cyborg (see pictures).
Thank you already
mr.yoxon