First track run - less than exciting....

Keep something in mind, I have the eddy dual quad and the 2 500cfm 4bbls. I also have a 8" 4500 stahl converter and 4.56 or 4.88 in my car. When I had the 11" 2500 stahl converter in my car I had no bog at the line but the best 60' time I had was 2.00. That was with 4.10s and 4.88s with 0 tire spin. As soon as I changed the converter I went from 2.00 60' to a PB 60' of 1.66 with the DRs barely holding on with 4.10s and an 11.57 at 115.5. The new hemi has a huge runner volume with whatever head is on it compaired to a SB. I would absolutely try to work the bog out first but what size converter are you running rat?