The HQ element of Mid-Tech says they may be mounted in a NIFV for +150pts.
The entry for NIFV has weapon options for additional cost.
Is it safe to assume that a unit that takes a NIFV does not get any upgrades to the vehicle, even at the increased cost, because of the benefit of not taking up a "Fast or Light Support" slot?
The same question applied to the generic "APC/Transport" options on pp71-72.