cowl induction Q's/ideas

after reading all the postings in the archives about cowl induction i am thinking i might rig something up this winter but am not sure quite what i want to do i have a few questions.
1. Some one mentioned that forced air and SU's dont mix. can anyone say for sure one way or the other, will it mess up my carbs or just require a "tune up" to get correct mixtures??
2. is there anything to be gained from using as much of the cowl area as possible and funneling it into a single feed to the carbs as oposed to just cutting a hole and routing it to the carbs.
3. would i gain from blocking off part of the cowl?? like using a solid piece with a few holes cut in the top instead of the stock part with lots of holes.
4. would a scoop or something increase the effect or is the stock cowl shape good??
.