Which engine 70 dart

No problem, man.
It's just that i've seen too many ''still born'' projects sit and sit because the owner had delusions of grandeur and the car never gets finished.
Maybe throw us a bone here about the basics of what you want and can do yourself.............

I can do pretty much anything, I once resized a connecting rod for a 3.5 on a lathe, I once over bored one hole in an olds 403 with a hand hone, that car ran 13.5 easy. I'm a total budget guy with access to lots of cheap used parts. I have a 383 sitting here, I have a 340 sitting in my kitchen, I'd be happy with a 318. I finish projects. I'd like to be able to run a catalytic converter for smell control, I'm almost thinking about one of those pre magnum 318s with the holley FI, factory setup but nothing is in stone, just feeling it out. thanks for your interest!