you can buy mounts to fit either a zetec or cvh into a ka. 1 of mine is a zvh, the other is a cvh.

joey-p makes mounts to put a 2.0 zetec into a ka, and i believe you can use the same mount for a cvh, and if you use a cvh you use the standard ka box and get the bell housing modified so suite the different starter position, if its a zetec block then the starter is in the right place anyway and the box can just bolt straight up.

my silver 1 has just had a plate welded onto the inner wing and a fiesta turbo mount used.

heres my silver zvh 1 which was recently dyno'd at 246bhp and 270lb/ft of torque....