Hi DD

Ok , i will check it again in the week end, my distributor is in middle of the engine i think it also has the same firing order ,Took it to the 5 BTDC and installed the distributor line up with Terminal 1 in the Distributor cap and then set the Contact point then after it started on first key but backfires on low idle when higher rpm less back fire,
is there any reason for it to cause this problem other than firing Order ?

thanks
regards
sumith