any body know what pm 3-6 head codes is?

I have a 95 honda civic ex. i replaced the block cause the motor was bad. When i went to put the timing belt back on i discovered the new one from autozone was way to tight i couldn't get on. the block is a d16z6. The head code says its a 94 pm 3-6. The tensioner pully is all the way down by the way still no luck. so i called autozone and asked if there was a special tool to help, or if there was something i was not doing. The guy said that was weird that his 1.6 went right on. There is a adjustment cam gear on it by the way. So i put the old timing belt on and it seemed to be to loose. If somebody could help i would really appreciate it i'm really getting frustrated. thanks

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