That's more work than fitting a vr6 engine
Yes, but the 16V won't try and bankrupt you with fuel consumption.
This isn't a worry to me as anything I do I'll get better mpg, my current car is doing 17mpg on a run, compared with the 52mpg I was getting when I first got it, even a vr6 will do better than that that.
I really want to put an audi s3 engine in it, but I think I'm going to end up with a tuned vr6.