Many thanks for the replies.
My rusty brain recalled a few more details from the book. I think some were set up as high speed merge and others were done with either red or blue elements in advantage/disadvantage positions.
I would think that as stated, in any type of BVR engagement the Harrier would generally fair poorly. These were probably close in fights then.
One of the interseting tactics they used was to employ the Harrier's wing to shield their exhaust in order to deny a sidewinder shot.
I think I'm going to have to read the book again!