At a loss... HELP

Okay I have a 225 slant 6 that I recently put in a comp cam kit (k64-241-4) with 220 lift 264 duration, offenhouser intake, clifford shorty headers, a new distributor, and a 450 cfm quick fuel carb. I also had a .3 head shave and 3 angle valve job done. There is also a new fuel pump and fuel filter... Everything is put together and the thing starts right up. The issue is that there seems to be a "spot" where it seems as though its not getting enough fuel, it hesitates for different periods of time, then all the sudden ramps up like a bat out of hell. The weird thing I noticed is that I am only getting it up to around 3500 rpm and it stops. Another issue is when I get it idling in park where it wont die after putting it in drive it idles around 1000-1200 rpm and when I put it in drive, the transmission bangs hard but the rpm drops to around 600-800. I know this is too high of an idle which is causing the banging, but as stated before, it dies when put in drive if it is set any lower. Sometimes when driving I either stall out immediately from a stop or it builds up rpm then hesitates for a while and then boom I start gaining speed and rpm's then it shifts into second and so on... I have checked vacuum, timing, fuel pressure... I am at a loss... Any help would be much appreciated!