Aside from body stuff.
I've been doing some research into the driveshaft, and found out some things I didn't know. Also, some concerns I previously didn't know existed lol.
I didn't know there's a critical speed for D-shafts.
Always assumed if it was balanced and had good joint angles you could spin me to the moon.
Mine is about 70" , joint center to joint center.
As per the Mark Williams page, even their bass azz units at a shorter 60" won't take the potential speed I could throw at mine.
Which at 1:1 in 3rd, if I took it to shift point, would be 6400-6900 rpm. 6900 being if I was IN 3rd and not OD.
Likely this would never happen as I'd be doing 130+ lol.
But it could......

I've been 110 in it before.
So, for all intensive purposes, I think I may do a 2 piece shaft with carrier bearing.
I'm going to talk to my local drive line shop and see if that actually would help or if my thinking is off.
I want to rebuild the cross member behind the trans mount anyway., for exhaust clearance to get an X pipe in. So I could slide it back 10" and make it the mount for my carrier too.
Which by the time I add the splined end past the carrier, and a yoke on that, ... I'd sorten my center to center more than enough to get inside of the limits of ANY of the Mark Williams line.
View attachment 524737
Anything bigger than a 3" in a 52, or anything at all 50" and down.
My main concern is saving the bearings in my pinion and the tail of my transmission.
I'm at 100 mph OFTEN in this thing, so definitely want everything to be happy.
I'm actually debating working my suspension change into the same cross member... But that's a fleeting thought, and wouldn't happen at the same time. It would just be something considered when designing the cross member its self.