I wish I had tested the Street Dominator, but unfortunately I forgot it was even on the shelf. Here are comparisons for the RPM dual plane, Torker II single plane, M1 single plane, M1 Single plane and 2" Super Sucker. The M1 was right OOTB and had no plenum modifications so the Super Sucker would transition properly. 440, 8.9:1 XE285HL, 850 Mighty Demon, 2.08/1.74 346 iron heads flowing 280cfm @ .600"

rpm......RPM TQ/HP......TKR II TQ/HP.....M1 TQ/HP.....M1+SS TQ/HP

3100......444/262.........416/246.........423/249.......439/259
3300......478/300.........447/281.........452/284.......467/294
3500......496/330.........481/321.........480/320.......488/325
3700......500/352.........488/344.........487/343.......502/353
4100......482/376.........464/362.........477/373.......487/380
4500......484/415.........489/419.........503/431.......514/441
4900......485/452.........503/469.........504/471.......512/478
5400......485/498.........490/503.........493/507.......505/519
5600......437/456.........463/493.........469/500.......480/511

If you have hood room the M1 and 2" spacer might be the ticket. I think that from 1500-3000rpm you may find that the stock iron 4bbl works best.