Hi Guys , 5-6 speed 1970 hemicuda , help needed

hi guys , starting a restoraton job on my new project a 70 hemicuda , orgnaly a 340 4 speed car , now going to be a 426 hemi - 5-6 speed - Dana 60 rear end , but i dont know where to start , theres so many trannys , and i dont mind cutting the floors they need to be changed anyway , i knew i guy that swapped an lx 5.0 mustang tranny to a 416 stroker and he ran this thing like crazy and it worked very well and didnt spend that much.. all the kits i see are 4-5000k , and theres no way im...

Hi Guys , 5-6 speed 1970 hemicuda , help needed