the engine won't physically fit under the bonet because it's too wide at the top

the easiest way to find out what you need to bend is to get hold of a sierra dohc rocker cover, find out how tall the engine is and then put it into place
you'll see that the exhaust cam sprocket bit of the cover will foul the bonnet so you need to either cut a hole in it or bent it out by about an inch

there is a guy who's done it in the xroc so that might be a starting piint