1970 dodge dart setup for street and strip?

I don't know what a turbo build would cost but there is a nut case here from way down south that did a build. Search around and I'm sure you'll find it.
Look for Bill Deedman. Spelling could be off.
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For a V8 swap, the quickest and easiest way I can think off would be to swap in a 5.9 and sprinkle with bolt on's and a cam.

But this kind of build can be expensive due to sub par parts and the need for a V8 trans and a converter to match everything.
The rear is probably a 7-1/4. You'll need a 8-1/4 at a min. There inexpensive but it all adds up very quickly. The radiator as well. Upgrade. Do you have drums all around, your gonna love it when you upgrade away from dinky drums. But that's mo-money.