440 in 72 Dart Swinger?

good headers are going to be one of the biggest line items here and making your decisions early is a must. underchassis, fenderwell, power steering, power brakes, ac are all considerations that should be adressed before you start.

if you're not in a rush and looking to go bucks down, you can occasionally find people that are pivoting away or going in another direction from a BB swap and are unloading all the bits.