Is this you? It would explain alot...

 

looks kinda like me sometimes ^

 

SnoMan, you have no clue what you're talking about so please don't bother spouting off bad advice here. He's building a mini-monster truck, not plowing snow. People stretch and snap chains all the time in 203's with STOCK gears and tires. 6.72 gearing with 48" tires is decent enough but will still never live behind serious horsepower.

 

Ummmmm..........SnoBlow Dude- no expert here.........I've seen 203s snap under the power of severly underpowered motors running 4.10s and 33s...................

Go smoke your crack pipe some more........

Seriously, who would reccomend a chain driven case for a build like this????

 

yea, i would go with the running gear of the duece, plus you could have a cool sticker that says [powered by a duece] or something like that.

 

Now guys give snowman a chance here he did say with regular servicing just didn't add the part about having to replace the chain every 6 months or so and new bearings once a year, and check for chain stretch each and everytime you start the truck, if you do that sure the 203 will last just fine. I mean after all who wouldn't want to be servicing the Tcase more than you drive the truck come on.<a href='http://www.smileycentral.com/?partner=ZSzeb008_ZNxdm824BXUS' target='_blank'><img src='http://smileys.smileycentral.com/cat/15/15_4_115.gif' alt='Smoking' border=0></a>

 

Yeah its safe to assume that the minimum power he'll be turnign will be 500hp (as this is what these motors with a dual high intake and some good carbs would easily put out, i know as my dad owned one, and we just went and looked at the car tonight as the new owner wanted to find out some history about it as its getting restored), and as said above combined with 48's that power and all the weight this will weigh that 203 will go boom, or the chain will anyway, only chain case that comes to mind that might work in this type of use would be the NV-271, or whatever it is the superduties use, as it actually has a higher tq rating than the 205 does.

Me personally i'd look into an airshiftable rocky case, as those are designed to work with big heavy tires and lots of torque, plus the amount of drop they have will help keep dshaft angles nice and flat.

 

Thanks for all the input about transfer cases and everything. I'm looking at a quick change drop box from SCS Gears. Anyone know anything about SCS and there drop boxes?

 

I was wondering that too. there were only 1359 ever produced in a mustang/cougar.

but I guess it must be an aftermarket block/head combo.

 

you are right on the number produced in vehicles but there was actually several hundred (actually a couple of thousand if I am not mistaken) that were built and sold for racing only and never put into a factory vehicle including some stroker versions of 494 cid if I recall correctly. These are not figured into the production numbers anywhere so they are forgotten frequently. And then in the 80s Alan Root started producing a repop version of the boss head, and frpp also sells the A441, and B441 versions, plus there is another company that is producing them too but can't recall right off who that is.

 

There is a Boss 429 and Boss 302 within 25 miles of my house.

I also have a few of them laying around in the shed, notice my name

 

Theres the link for the 429 boss

 

Oh, for a minute I thought those blocks and heads were gonna be expensive.

 

LOL, not too bad just bout 15 grand if u wanna build it urself

 

Yes and they were likely never serviced and lubed properly too. Kep tproperly lubed and up to spec they are very solid unit. What happens when they are not lubed and service properly, the chain wears prematurely then it gets loose and then it trys to jump a tooth and then the strain of this can snap the chain. In proper order you will not break them even with 400 HP. They are stout but you would know that too if you had a engineering and design background and could appreciate the logic of its design and its heft. I was driving 4x4 before those cases came out in 73. How many of you were? I have seen them take a terrible beating and survive and even survive years of snow plow duty too. To "dish" a Tcase because it is now 27 years old at the newest if still stock and it is not "fresh" and properly serviced is just plain uninformed and improperly biased judgement. With a fresh rebuild and proper lube you will break the drive shafts or stock axles before you damage that case. It was originally designed for a 10,000 GVW rating. Back in 75 GM did a stunt (this is not a Ford slam but a example of the 203's strength) where they took a stock 3/4 4x4 with a 400 and 4.10 gears and towed a 747 with it. (it is in the genisus book of records too) for over a hour and at one time even exceeded the speed limit for towing speed at airport with 203 in low range the whole time. That Tcase is one tuff cookie when in good order. Try that with a new truck/tcase and see how long it takes to tear it up! (BTW the yukes that they normal tow those things with weight about 60K and have fulltime 4x4 too and about 140 HP too. THose yukes are beasts too as I whatched one once drag a fully loaded tractor trailer badly stuck in the mud a few feet deep with all wheels effortlessly with no drive effort from semi.