Need to make a decision fast 5.7/6.1/340

I have been a fabricator/welder for about 12 years now so that part doesnt intimidate me. I just dont want to start this project and end up with 15k into just having the motor in. I guess i just dont understand all the parts that im going to need. Its the electronic part that i dont understand and the fuel system. Someone said to look at the fast efi 2.0 but thats $3k right there. Idk what to do. I want my car drivable again by spring. Living in michigan, that gives me about 6 months lol