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Originally Posted by BLACK85GT
The H.O. is not determined by the heads or intake. It is determined by the cam. The H.O. cam uses the 351 Firing order (otherwise known as the H.O. firing order in a 302) and it is a roller cam(a cam used with roller lifters).
So my question would be, Do you have roller lifters in this engine along with a roller cam? You need to determine if you are running the correct firing order to proceed troubleshooting other things.
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Yes, it is indeed the roller motor, and i don't have the HO cam, but once i get things running correctly i will be putting in an upgrade anyways. The firing order is for non HO and HO are different, but the cylinder sequence is the same, so i figured if i changes the order on the cap to that of the corresponding HO ECM it would run fine, but it seems like it is off by maybe 1 or 2 cylinders.