[Torment]

I run nitrous oxide by NOS (company brand name) as an intercooler - power booster sprayed in under the carbs before the rotors. The IV's are ported a bit but I've run Dports as well with very good performance - I don't think a well setup Dport like the 6X's you mentioned would hold you back from attaining same/similar/better performance than I am. I simply ended up with the IV's through a parts trading scenario.

As far as performance your setup is a bit different from mine but, assuming the 6-71 is in good shape I think it would be attainable. I think it'd be pretty tough to get there on pump gas and 6-7psi though. I ran 10.3's with a 255deg solid on a 110lsa, Dports, and 11-12psi boost back a few years. Maybe it would have went 10.8-9's on pump, don't know I never ran it that way at the track - only on the street. Can't comment on your carbs as limiters - no experience, I've only run the Holleys with the blower. I've had friends that have run them for short periods of time and got rid of them soooo....maybe lack of our knowledge, maybe lack of carb ability, maybe both.

The right converter makes a big difference on the track if you want that 10sec et, on the street it's not much of an issue - consult your favorite company. Proper initial and total timing is very important. For benchmark tuning purposed I'll tell you I run 25deg total and locked out. Don't run a wide curve, if you get under 18deg initial (idle) I've found they tend to get hot quickly. Don't restrict your air inlet, and don't restrict your exhaust - either will make it a slug. Spend a little time finding the right jetting either at the track or on a dyno.

Maybe more advice than you're looking for, but hopefully some of it saves you some time and gets you up and running quicker.