Look for one already done, trust me. I’ve done it both ways and it’s way cheaper starting out with one done. I paid 7500.00 for my black Duster with a well built Dana, CRT 727, good convertor, 11 second small block with Edelbrock heads and Victor intake, 7al3 ignition, 8.50 legal cage, and much more. Then while my son raced I made it how I wanted it each winter. Try building one for double that with those parts.