My buddy has an 87 with the HO motor in it. he just put gt40 heads, some headers and a new cam in it. The cam is a comp cams 31-601-5. I cant get the timing right to save my life. I think im a tooth off on the distibuter but my main concern is what would the firing order for this cam be? would it be 351W/ HO firing order or the old school 289/302 firing order? As of now it runs on the H.O order and ive got it set at 10deg with the spout connector out and it pops and misses like crazy. it will only run with ur foot in it. it wont idle at all.