Re: a6 head on z6 block?
 

you can keep the P28 and never mind the cel 22 code. You'd have a 6800 rpm limter instead of 6500 with the PO6.

The PO6 maps and low cam maps on the P28 are damn near Identical.

Re: a6 head on z6 block?
 

Might have to use the a6 timing belt, unless you can get the tensioners to stretch far enough.

Re: a6 head on z6 block?
 

And D15B7 mappings are far from ideal for an A6 head/cam.

A6 is the bestest D-series head... if you are willing to run o/s valves and do a little work to one. Not that I'd worry about it when DIY boost controllers are $15 or so. :)

Re: a6 head on z6 block?
 

no actually i am using a PM6 ( CRX Si ECU) and im having problems getting the right timing belt for it. Damn it. Actually the block is a JDM D16a (very similar to a z6 block)