Thanks for your reply's.

The pbr clutch kit that I have bought for the A15 motor is the same part number for A14 and A12 motors

I would think that that A15 would of been a different kit, being a more powerful motor.
It lists a different part number for A15 on the clutch industries website (R169n)
and the A14 and A12 are the same kit (R137n).
I bought it from Burson Auto Parts and the R169n kit was listed for the A15 vanette motor, but they said the R169n clutch kit tranfers to the R137n kit

So to play it safe I might just go for a heavy duty exedy clutch kit.