I spent a couple of hours messing with it today. Hooked up a water hose to the heater return on the water pump and dumped the waste water out of the shop to really get all the heater core, and lines...

First startup of the 383 in the Express with the factory L31 based manifold and ignition. Running on a Green/Blue P59 out of a 2004 DBC 6.0L van. So far I have segment swapped the 4L85E, turned the...