you can use a 4x4 head on a 2wd block and using a cometic triple layer gasket which i thicker will give you a comp ratio of about 8.2:1 ish only if the head is a std size.

Must be checked for det and chip changed to accomodate this otherwise its piston melt down

Most tuners(of the shelf) chips will be tuned for comp ratios of a bout 8.2/3:1 to cover them hence its alway better to have a cossie LIVE MAPPED then you know its right..

Be carefull and good luck