i currently have stock 1973 kombi rims and have tyre size 185/75 R14. what size can i go on the original rims and what brand of tyres do people reccomend.

You can go either 175/14(narrower) or 195/14.(wider) Bear in mind that they have to be commercial tyres for load and not car tyres.
As far as brand really depends on how much you can afford..
5PL1T :thumb

You dont need LT (light truck) tyres on a kombi do you? I'm running Hankook K406 tyres on the rear of my oval... they had a good review in Europe and they came in the top 3 or 4 in the wet braking tests. They are also relatively cheap. They are symetrical and non-directional so it makes it easier to rotate them around your tank, I mean bus. I paid $125 for a V-rated 225/60/15. They have silca in them too which all manufacturers are claiming reduce the rolling resistance (saves $) and better grip in all conditions(saves your @$$)

hope this helps..

alternatively, you could grovel to CT Hansen (full_noise?) coz he works for Yokohama and could cut you a deal...:thumb

Fit some Micheline there always nice n quite...

Check with your insurance company, because some stipulate LT tyres for vehicals of a Kombi's weight. Have an accident with radials on and they can get out of paying. I have a friend that this has happened to!
I run LT's on my Kombi and it definately handles better, rides a litle harsher, but less sway in the rear. and I haven't had a puncture for 10 years.
Rob....