really all the heads are about the same you just have to be careful when putting the o rings on.A guy gave me a tip on how to install them i have never had a problem since .If you put a little Vaseline on the o rings then they will stay in the parts and not fall when you are installing them.Also put the dome on the cyl centered and then the base then the stud o rings then the top plate and you shouldn't have any problems just remember to recheck you torque after about a hour of run time.