DO IT !
there is nothing like boost!
cam will lower dynamic compression anyway
van motors are low comp to start with
the heavier and less aerodynamic a vehicle is the less comp you can run(more load)
so in a light car (1200) van comp is fine
std turbo engines have around 180 psi cranking so if you have less its ok
if your quick that guy might still have that complete setup.that will save heaps of mucking around fabricating brackets and ducting
dazza

do you know if a12 and a14 valve springs will fit on an a15 head? theres some available from my usual place and it says for a12/14 but doenst mention a15. would these be fine?

Yes, the same. In fact A15 just use A14 heads.

ok thank you very much.

what sort of power will a standard clutch handle? id put a new one on there of course if it could handle the supercharger

GX springs, (Doubles I can supply new)
along with seats collets and retainers..

get a lumpy cam with a lobe seperation angle to suit supercharging. I just ran a 14.9 on a stock a14 apart from dual valve springs, and a supercharger and extractors. The abaence of a big can has lead to a massive increase in the amount of boost. Which sucks.

have you dealt with kelford at all?

do you think the stock camshaft was severely slowing you down?

Yes. I had a kelford cam in the blown A15 that I just killed. Are you in NZ? Stick your country/city in your profile.

im in invercargill. id be interested, was it a good cam for the engine setup?

yeah it went all right. I'm going to rebuild that motor, and reuse the cam.