Hiya mate and welcome...and great news about the new addition...
Deffo a wise choice going LWB...still good offroad, in fact better at climbing I have found..
The 2.8 was only available in a fronty A...the b's had the 2.2dti lumps...
The 2.8 is an unrefined ultra dependable torquey lump...the 2.2dti is a lot more refined and goes well but complex if it goes wrong!
Me I like things I can fix with a hammer, so that puts the b's out of the equation as far as I'm concerned...
Both a and b have torsion bar front and coil rear (if you are thinking 2.8 in an A)..so are similar like that, but body, trim etc are different
We have 2x 2.8's and they are brill....and a 2.5tds which goes like stink, but scares me, as when it goes wrong my hammer wont fix it!
Welcome again matey...and I hope this is helpful..
Laters
Gregster