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Whoa, that looks like a great start.
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That is not too rough. Better than 95% of the M715s out there! I don’t know about the transfer case verification but it looks original and so does the T98. So I would say it has to be a NP200.
Very nice start. It appears that you have the original transmission and transfer case so that is a good start. Also, Chevrolet inline 6-cylinder engines are usually pretty reliable. Blue smoke is usually engine oil. It could be valve seals or rings. but for starters, oil is not all that expensive for now.
NP 200 case in the stock OD.
Is that six the one they called the Babbitt Beater?
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Babbitt is the metal bearing shells are made of, and I think the engine I was referring to was the one used in CCKW & 7107 army trucks, and probably many other vehicles of that time period.
Great truck.
The 250 is a fantastic engine. If I remember right the rear main seal is a 2 piece you can replace without removing the crankshaft from the engine. And the valve cover is prone to leakage after they've been worked on... By that I mean they get bent out of shape easy when they're pulled and won't seal correctly after that. Usually if somebody used a wire wheel to clean the mating surface, that'll deform the metal just enough that it'll leak.
All tins are like that but the old Chevys seemed to be a little thinner metal to me. You might be able to find a new one if that's the case with yours.
And if it's like every other truck on here it'll need new wheel cylinders and rubber lines for sure. and if it's the original master cylinder, the old seal on it will start leaking when you start driving it regularly.
The E350 wheel cylinder conversion and a dual reservoir master cylinder conversion are pretty cheap and easy.
Beautiful plumbing job on your air lines!
I always knew there was a setup to do that but I had never seen one before...thanks for posting!
Seeing as it appears to be a hodpodge of both 24v and 12v items, I highly doubt it was built that way. More than likely it was a swap somewhere in it's life after it left the military. All the trucks in the military have used a standardized 24 volt system since 1952, these are known as M-series vehicles and where an upgrade of the electrical systems compared to the old 6 volt systems in WWII vehicles. By standardizing the electrical systems in all M-series trucks it makes supply and service easier for the military.
AMC was not involved in the 230 at all. Kaiser Jeep owned Jeep until 1970 or so...AFTER the 230 came and went.
Kaiser did use the civilian version of the 230 from 1963 to 1965 in the Universal series and the Full Size Jeeps. Then they redesigned it and used it from in the M715 family, correctly called the G890 series, from 1966 (prototypes) to 1969 (Possibly early 1970).
There were no other engines or transmissions used in the stock M715 trucks other than the modified for the military truck 230's.
There has been talk over the decades here at the Zone about the different input shafts needed to swap other engines in and mate to the stock trans and the T18 vs T98 diffewrences as well. We have been told uin years past the the 304 and 360 AMC have been mated to the T98 by swapping input shafts, bellhousings and adding a spacer...so I knew it has been done...just had never seen one.
I am extremely confident that someone did this with your truck...found the components and swapped the stock setup to a less troublesome, more common engine.
Its not a bad thing...would have been interesting if such a thing had been done factory...maybe they would have lived longer...
To me, the 230 is just another of the "Wow...what is that?" things about the M715 that make it desirable to some people....like me for example...but nothing wrong with yours...I love seeing all the variety and possibilities...THAT is a big reason we ever got started right there!!
I agree with the above. I also have no problem with the original 230. It did what it was designed to do. Unfortunately, today so many out there (not me) want power steering, hydra-boost power brakes, lots of torque and so forth. Nothing is wrong with that. It is just not what I remember and I like the truck stock. I love the whine of the transfer case. That is what I remember from my days in 1969 and 1970.
Its all personality!!
Yep many 4WD do that. Just have to back up and they'll pop right out for you. Even my old M151 use to do that on occasion.
That’s funny... RIP little Rattle
Can you tell us what shocks you used, and where you bought them? Glad that snake lived long enough to see a M715. His life was complete.
Looks good Brian! Keep that truck rolling.
A question: Does the pick head fit into the holder on the bed? I have bought a couple of them and they are all shaped incorrectly and are too long.
Thanks for checking!
Interesting... let us know how it goes. Could be interesting. You upgrading anything else while you have it out? Radiator?
Well keep going brother. I think your doing great. Really cool project. Keep them pics coming!
Looks great, thanks for keeping us updated, look forward to seeing the end result.
If you're having that manifold bead-blasted, make sure you clean it throughly, or you''re likely to wish you'd chosen to leave its previous carbon residue.
You do a pretty good impression of a mechanic. Keep up the good work.
Nice work Brian. Looks great man!
Hey man... sometimes you just got to make s&#% work!
Bummer. Any way to check the passages?
chick your oil filter mount for a bypass you might have to have a filter with a bypass. the 258 had both
Beautiful pics man... good luck with the engine.
Glad your doing good after surgery. Hope you get that truck out on the road soon,
Wish you well on a speedy recovery, glad they found the problem with the engine.
Someone needs a poor review on EBay?
Good luck Brian. Hope you get your truck running soon. Keep at it.
This is a cool build man. nice to watch the progress, Cant wait to get mine built 100%.
To bad my build is going to be 5x the cost.
Going to take me forever.
Really glad it worked out Brian. Hope you get that beast running soon. Good luck on getting an engine.
Oy! I hate that crap. Stuff like that is why I do as much of it myself as I can.
Every time I drop parts at a machine shop I kick myself for not going to school so I can do that myself too.
I know you dare not reveal the name of the company, but I wish you could. They need to be black balled for their less than transparent business practices.
Sorry to read about you troubles. If it’s any consolation it’s making my choice to convert to a good old Chevy 350 seem better, lol. Keep posting though, even if it’s frustrating sometimes. We all love reading about others builds! There’s just so many details to learn about these trucks!
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you might mention to him that you are "discussing" this transaction with other military vehicle owners.