1)as much power as you'll ever need
2) dont post questions like that without specifics i.e what are u gonna use the car for, how much are u looking to spend, where are u gonna source the motor from, why are doing the swap anyway, how much power are u looking to make
3) USE THE SEARCH SECTION
all jokes aside dude u r gonna get shitted on hard as hell when sum of the guys who have been on here for a long ass time see a post like this, in what i believe is the wrong section, especially when this swap has been done countless times before and many people have posted picture journals of their build step by step...
i hope your ready bcuz ppl on here are gonna tear u a new asshole when they see this post... the bes of luck newbie