Besides the 203, what other full time 4WD t-cases are available for mounting behind the C6 on a 77F150 with few modifications.

My truck is coming out of hibernation thanks to a new job with a lot more pay and a turbo'd 460 is in the works. I want to run all wheel drive on the street and strip for traction on the launch.

 

I think you are insane. Depending on how you build your 460 you could be having some serious power at hand...or should I say foot. I think your only option is the np203 and it is very strong, but I don't know if it is THAT strong. For that matter, with all four tires hooked up, and that much hp and torque, I bet you can kiss the c6 good bye too. Hope that new job pays really well, you're going to buying a lot of parts if you do put a turbo 460 and push it to the limits (which of course is what I'd do). God be with you....

 

The 203 is chain drive and that chain can break under lots of power. Why not use a 205 and lockers? Same reuslts and it's selectable? My $.02

 

You shouldn't drive the 205 on the street, and the 203 is the only option you have for a full time t case, unless you try talking to atlais and advanced adapter I don't see anything else.
Actually the 203 is almost as strong as a 205. It is chain driven, but if it has a new chain in it, it would last at least 100K miles, but with the power you'd be putting through it it still should last at least 50k. The C6 is a very durable transmition and with a shift kit it should hold up pretty good. To strengthen the rest of the drivetrain, get bigger and stronger u joints and yokes.
Just wondering, how much power do you what out of your 460??? I mean you could mod it for a pretty easy 700, + turbo who knows!

 

Better buy Dana 60's if you end up with 600 hp plus! Wow.....sounds fun! I'd kill myself.....

 

Yeah, the C6 is gonna be built to handle it. I need to play with desktop dyno and see what the motor will be producing. I want something that sounds mild at idle, so no obnoxious cam is going to be used. Just enough duration to not have a lope to it, and as much lift as I can get before valve clearance becomes an issue. That way I'll be staying below 6500RPM and not needing to drop a lot of money into a full roller valvetrain. The bottom end of the block will most likely be 2 bolt caps with a main girdle, and a short fill of hard block. This will by no means be the daily driver, I have a Ranger with A/C, cruise control, and a nice stereo for that. This is my toy. So, 100k mile longevity is not a crucial concern. It just needs to all work together for a 1/4 mile at a time.

I've already had the 205 gears bind up crossing a paved road while off roading, and it took a decent size hit head on from another truck to unbind it. I was amazed the hubs didn't snap first. That's what has me hunting down a Ford 203 on ebay, which is damn hard to find. The drudge/chebby one are all over the place. Once I get that, then the chain to hold up is the next part.
I'm going to keep the 400 in it till the all wheel drive is sorted out, then the fuel injected 460 (possibly stroked to 545 if the Scat kits stay cheap enough on ebay) running the Megasquirt system gets built. Once that is broken in, the vacuum will become boost.

The 9" already has 35 spline axles stock, I counted when I changed the diff after the spider gears welded themselves to thier shafts, and I'm not going to be spinning huge tires, I'm thinking 31" X 13.5" in the back and 31" X 12.5" or 11" in the front. If i spin the wheels a little, that's okay. I'd rather that than 100% traction followed by snaps and pops of the driveline.

The 44 in front may get a limited slip but I'm thinking yolks and drive shafts are going to be the main leak wink.

Its going to be a learning experience, I haven't seen a 6000lb all wheel drive drag truck yet, so once it gets going, I'll share my successes and carnage with everyone here.

 

bigredtruck,
Have you already mapped out the piping on the truck for the turbos? You going to run twins or just a big single. and what about the manifolds? Is it possible to use factory pieces and bring the hot pipe back down and to the front and mount the turbo low or is a custom built exhaust manifold needed?

Sorry for all the ? just thought since you are working on your project might pick your brian so save me from using mine, since mine might melt down at any moment if I overwork it.

 

How much do you think you'd want to pay for a NP203 in descent shape with a rebuild about 40,000 miles ago?

 

So far, all the plans are all in my head, but I was thinking about using an elec fan to free up room in front of the engine, and using one turbo with a crossover pipe to get everything to one side. The battery is going to relocated either under the truck, or in the bed.

I need to start looking into shortie headers that can possibly be turned backwards so that the collectors point to the front of the truck or upwards. That would make the the plumbing a lot more easier. A single turbo from an older power stroke may be the right size. Also, the inner fenders are most likely going to be taken out to free up room. The only thing I have in there now is an MSD that can go on the firewall and the battery.

The turbo is for later. For now, I need to get the drive line and 460 EFI squared away. The Megasquirt is a basic EFI controller that you put together and solder jumper wires on the board to set the # of cylinders, injectors, coils and other variables. The base kit is below $300, and can have an added boost sensor piggie backed to handle forced induction. The website www.boostang.com was my first time seeing this system, and the guy who owns that car is most likely going to get bombarded by questions from me when I am assembling the system. He has a page on that site dedicated to the Megasquirt system.

I know I could get a factory EFI system for a 460, but this thing is MUCH more wide open for HP potential. If the 460 becomes a 545, it may not need the turbo, but who knows. It may get done just for the cool factor.


As for the cost of an NP203, I have no idea. Let me look around and see what the local bone yard wants for one in similar condition without a core and I'll come up with an offer.

Okay, I'm off to bed, I have to go get dunked in a pool while inside a fake helicopter shell and escape as quick as possible tomorrow as part of being certified to go work offshore.

 

If you can get one in a junkyard(203) go that route. It'd be easyier, cheaper, and you wouldn't have to worry about shipping a 300lb t case.

 

I dont think you will want the steering characteristics of a solid axle being powered at all times .......i would just transfer weight to the back and try to get more rubber on the ground with tire selection

 

The D44 is an open diff right now, so it doesn't try to drift around. The limited slip shouldn't be too bad. Like I said, it only needs to go 1/4 mile at a time in a straight line really well. The rest of the time, I will tolerate bad handling.

 

After you do all the mods to it you better just go out and buy a trailer and tow it to the track or mud pit. Sounds like it will be pretty worthless for everyday street use.

 

Well, like I said, I have a 2000 Ranger with A/C, power steering, big stereo, and 20MPG for my daily driver. This truck will be used as a toy since it will probably get GPM (gallons per mile). The big stereo is in my gallery.

The closed chamber aussie heads in the gallery also may be back up for sale once I get the 460. They've been in my shed with regular coats of oil to keep the surface rust away. They have already been semi ported, just the rough casting flakes have been ground away.

 

Hey,

Don't get me wrong, you have a great project going on. My 4x4 toyota pickup with a 70 vette 350 doesn't go a lot of places without the trailer. In fact I'd rather ride a horse on the street. It's really that bad with lockers front and rear, a monster cam, and 35 inch tires. It spends lots of time on a car trailer on the way to mud rallies, and hill climbs. However, it is wonderful off road, for which it is now designed to do very well. A couple of years back with strip tires, just for giggles and fun, it ran a 12.63 in Palmer, Alaska, in the quarter mile at 7,800 rpm's. It did win best in the foreign class, and that was over all the little rice rockets. They were very envious. It was very scary, and I don't know how fast I was going because about half way down the track the spedo was maxed out at 85 mph.