Figured I'd better start a thread for Q&A on this swap.

The 7427 that I've bought came out of a '95 1/2 ton van with a 350 and automatic tranny.
The truck that it is going into is a '91 1/2 ton 2WD with currently a 305(not for long)and auto tranny.
I know already that the 4L60E shifting parameters are going to have to be 0ed out with the exception of the TCC lock.

Correct me if I'm wrong but doesn't the 7427 have the ESC built in?

How far downstream can I run a HEGO? Right now it can go in the exh. manifold but eventually it will be going into the exhaust possibly 36" from the collectors.
My plan for exhaust on this truck is 3" coming off the collectors with the left side crossing over under the tail housing of the tranny then going into a muffler with two 3" inlets and one 3" outlet then up over the rear end and out the right rear in the stock configuration. I would like to put the 02 in a crossover pipe right in front of the muffler,that way it reads both sides.

I read that you can hook a WB02 to the input for EGR position. Is that just for datalogging or can it be set up for BLM?