Thoughts on witch stall to get

Ah thanks for thinking of me Pettybludart,how is your build comeing?3forty not now but in the summer I plan on a getting a 8 3/4 with 323 or 355or 391.Rumble fish it a 69 Dart,what do they weigh?got me lol It will be a street car mostly,my thoughts is without one my cam may not idel well.Like I said I would like to get one on my own,I am sure a parts store will up there price.