The conclusive answerr is yes it will fit no probs yes it is smaller and yes it is narrower it i have to say looks NAFF with a capital N given it was made to fit a far smaller vehicle a secondhand pop top for a T4 is not a easy beast to either move nor obtain one for a bongo is slightly easier as many Bongo owners seem to be fitting hi-tops now they are finally available for Bongos.... The Bongo roof has to sit back farther and does quite sit on the roof right i shall find a pic and put it up for you in honesty if it was me i wouldnt bother as it will look as if it was plopped there as an after thought and really out of place...... a high top of a swb T4 fitted is only about £500 ish from Ray on here by the time you bought a bongo roof, transported it, fitted it etc etc you wouldnt be far off the cost anyway and the hi toip retains heat far better for a child anyway.......