rember most bike engines are air cooled not water cooled so there will be alot of modification to sort it out
welcome to the 1980s. Most modern motorcycle engines are watercooled – especially big 4s
You will have many issues tho – with it being a front wheel drive car mating up the drivetrain will be hard. The motorcycle engine is unit construction – gears in the same unit as the crank – so its hard to use a car gearbox as you have to modify the crankcases in a major fashion ( the exception would be a K1100 bmw motor I think and some shaft drive twins)
Then you have the gearing issue – motorcycle engines rev to 10 000 rpm plus and will be geared for 200 mph at the red line in top for something like that kwak – so you need to drop the gearing hugely.
Peak torque while similar will be at much higher revs than the car – 7000 rpm needed to get rolling – think of the poor clutch!
Then there is the physical size and shape – motorcycle engines such as you mention are DOHC with vertical intake manifolds – a bit hard to fit under the bonnet.
The only layout that makes any kind of sense for this is the front engine / rear wheel drive and even then its a major engineering exercise although there is a smart with a gxsr motor in it out there somewhere