just put a d15b2 head on my d16a6 block, i put a regrind cam from the d15b2 which is 272 now, but i am having a hell of a time trying to get this thing timed right. I have researched all over and cannot find anything or anyone that has had this problem. now the car is turbo as well, i have an adjustable cam gear as well. ive tried retarding the timing and advancing the timing. as of right now i get it to idle but barely everything shakes extremely bad and when i try to rev it up it bogs out quite a bit. can someone PLEASE help me out!!! Thanks a bunch