In the end, as the yanks say, you can't beat cubes: in other words a bigger engine. A saying not entirely true and particularly in these days of turbo charged engines, but it still has some validity.
Yep......in the end I succumbed to cubes! Increased power with the throttle bodies on my 4/4 didn't equate to decent torque.....as a certain member on here well knows

and I got tired of having to rev the nuts off it all the time. It did sound glorious though!