timing or bad dist.

[blazer2007]

well I thought you guys are always timing something,so I have a 70.s 454 with about 1000miles,comp cams xe 262 h cam,10-1 comp ratio. My harmonic has 2 marks,one for 0 and the other for total advance,34 degress.I,ve done all my tdc timing stuff but it likes to run as if the 34 degree mark is my 0 degree mark.I,m using a advance timing light set at 10 btdc where it likes the 34 degrees.There is no retard type timing chain,just a good one.I switched to a upgrade mallory hei but was wondering if this dist. could be giving me my troubles.The truck runs fine lots of power,going up hills etc.at the 34 degree mark.I,ve moved the dist. but it likes the same spot.I,m just wondering if hopefully is dist. or a underlaying problem,please don,t say cam