OK...Builder Bill is on my list to check out. I am also looking at the Mopar 3.73 & 3.92 Getrag conversions with axles & 2009 & Up LX driveshaft (maybe a chrom-moly upgrade) as well.
I'm gathering intel as I am going to do it all pretty much at the same time....engine & differential, plus some other mods I've had on the back shelf for some time.
Well something to take into account.... Chris (lmi) is running 3.55 out back. He is running at about 2700 rpms on the freeway at 80 mph....I believe he has a builder bill tranny, but it might be SHR.... Not too sure....
He is putting well over 800 to the wheels with his setup. What transmission are you currently running? My nag1 will be toast once I get my Novi blower in.
I know I am pushing the limits of what the stock trans will take so I'll be looking into transmission builds as well. I have a few friends out here that have done similar upgrades to their cars and one has a shop here...who is also an authorized DiabloSport CMR tuner. He's been through the engine/transmission/differential build more than a few times by now and I'm reaching out to him as well.