Hey bro. With the gas I'd probbably use a smaller shot but over the whole rev range. Especially if ur going to go with an auto and trans brake, you'll be able to ramp the boost up at stand still. If you have a larger shot of gas comming in and out of a touque band so quickly, it loads and unloads then loads again on your internals, considering you shouldn't activate gas before 3500rpm anyway. It will also cool ur intake charge air for those hot days at the track.
If your going with an auto, you might as well go the whole hog and get stock struts, springs and a set of re-valved pedders 90/10 shocks etc. A cheap allternative for rims as front runners, would be a pair of rx7 alloy space savers, I've seen them used very sucessfully.
When u do go to 3lt bottom end, remember the head/manifolding will sit at least 30mm higher, you may need to modify ur bonnet. Also, at 100mph+ aerodynamics will start having a big part, so I'd leave ur front bar on, some people see up to 2mph when they do...
If ur going to an auto/transbrake, slicks and a good ass end set up, u'll be looking at 9's I'd say with some practice.
Dose ur 25 have any internal work yet? oh and what did u do with ur old set-up?
Justin