First time doing an engine swap - simple: put a 5.7 from a '97 (with under 100k miles) into my '98 after my 350k miles motor died... Here's the problem: Upon start up of new motor, I turned ignition to run position to check fuel pressure - all good there. I then unplugged my Coil Wire to crank the motor a few times to build up Oil Pressure - all good there. Plugged the coil back in to start the motor up. Click... Click... Then everything is dead - no dash lights / no headlights... Then, 5 minutes later, power returns (dash lights / headlights). I try to start the motor again and same thing - click, click, then everything is dead. Wait 5 minutes and the power is back... What in the world is going on? Brand New battery with full charge - lead wires to battery in good shape - all grounds that I am aware of are in good shape... Anyone run into this problem? Thanks in advance!