hahaha sohc turbo = funyy... btw they are 8.5:1 compression but no quench area in the head... sorta bad for boost. Anyways.. there is a nissan factory turbo manifold that will fit... It was off of the z18et early 80's motor... it came in some s110's and fits te funky bolt pattern of the once cam head... its not a us motor but its easy to get the manny and turbo from the aussies. super simple and made 145 hp stock w/o ic anyways here is a link

http://www.geocities.com/MotorCity/S...4510/z18et.jpg

martin