Wind noise and new seals

Very soon I plan to repaint my 1977 Kombi Microbus and replace all the window and door seals with new ones.

What amount of wind noise would I expect with new seals?

Presently I can hear wind whistling from what seems to be every window.

I currenty have front and rear 1/4 vent windows which I want to change to full windows in the back (like hellbus) and fixed 1/4 windows in the front.

Cheers

Jeremy

If you fit the seals correctly and use good quality seals you shouldnt have any wind noise except form the passengers who might be travelling with you LOL