318 LA Timing

I have a 1967 barracuda with a 318 LA block and I feel that my timing is off and was wanting some help. I have set the timing chain up dot to dot with the crank at 12 and the cam at 6 o'clock positions with the distributor pointing at number 1 cylinder. The car has fire, compression and fuel but will not start. I read that on some of the older LA blocks that once the timing marks were set the crank has to be turned 360 degrees then the distributor dropped in. I have done this, and it cranks and runs but very rough. other than that, it will not run. any help would be appreciated and tested. I am at a loss at this point.