1969 Ford Crew Cab / Cummins Project

[averagef250]

Chains can be stronger than gears in a similiar sized package. I think as far as late model planetary chain VS 205 goes, the chain case may survive higher instantaneous torque and get better mileage than a 205 will, but will not have the lifespan or case toughness of the iron 205.

The new cases rarely break. They die for the most part from poor maintenance. They don't use many bearings inside, mostly bushings and when they are worked hard, the oil pump fails or not maintained well the bushings eat themselves.

[FormerMarine1981]

Sweet Rig, Lots of blood sweat and beer have gone into this build I am willing to bet. Makes me wish my crew was a 4x4.

[papabug71]

Man thats an awsome rig. & the pictures of your son helping are sweet. They made my wife say "Aww, that is SO cute"...!

[HRDROKN]

Man thats an awsome rig. & the pictures of your son helping are sweet. They made my wife say "Aww, that is SO cute"...!

Cool.... I hope he takes after me, something to be said for guys that can wrench...

[HRDROKN]

Hey Dustin.... have any experience with this one? I think it will work?

Picked this NP273F up for $100.... I'm going to take the output shaft, tailhousing and fixed yoke and see if it all fits in my NP271D for a slip yoke eliminator upgrade?

[HRDROKN]

I had to take a break from frame and suspension work... so I worked on the timing gear cover and the clutch master cylinder actuating rod....

[averagef250]

I haven't tried switching parts between those cases, but NP cases are pretty interchangeable between the same family. I'd bet at the worst there might be a difference in the pocket bearing size between the two. If there is I'd just machine an adapter bushing to make up the difference.

Is that cover going to clear the serp belt? Looks nice, but might double check. I'm working on a product that mounts to the timing cover tin right now and the belt is right where I don't need it to be and only an 1/8" from the timing cover itself.

[HRDROKN]

So I had to break away from the truck for a couple weeks while working on some automobile upgrades... strange thing is that I guess it did some good, because when I got back to looking at the twins... I see that I can get the primary underneath that that top turbo and clear the coilover hoop. I have to give those hoops some real thought now as the S475 will interfere with the additional hoop supports that I had planed for....

Turbo fitment...

[HRDROKN]

This connection from comp out to comp in looks like it will be a bit tricky....




Squeezed in there.....

[HRDROKN]

Worked on the mount for the primary yesterday..... I think it should work?

[HRDROKN]

Just about done fitting the hot pipe.... let see if I can get it welded whithout much shifting of the pieces...





Thinking I will add a strap between the T6 flange and bolt on the S300...

[HRDROKN]

So I took everything back apart to do all the port matching from manifold, spacer and secondary turbo inlet... kind of time consuming, but needs to be done.

[HRDROKN]

Finished up the primary turbo mount... not a lot of room to get that drain hose past the motor mount. I have two direction that I can go with it... to the stock location on the block or one of the two npt bungs that I added to the oil pan....

The mount...

[HRDROKN]

Finished the mount.....

[HRDROKN]

Port matched the primary turbine inlet.... T6 ports are huge!