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Alright... IH 345 In An M - - - Questions....

B

Bryce Frazier

Well-known Member
So, I am looking at buying a 1967 1 ton International dump truck running and driving. Says that the thing has real good power, good tires, and a dump kit for the flat bed.

I:

Want the dump kit for my 1956 Chevy
Need the tires and one piece wheels for my 1956 Chevy
REALLY want that 345 V8 for my M!

So, how hard is it going to be to stick that 345 into an M? There seem to be lots around online, it certainly isn't unheard of! We are guessing that it will fit right in and bolt up, no issues, BUT, what about the clutch, input shaft, pressure plate? What all needs to be done there?

I haven't looked at the ones online too closely, but it appears that they are using the stock frame rails and sheet metal, which means that the radiator and steering is probably fine. Can't really think of anything else that we would need to check out?

Dad wants to put a 4 barrel Holly and cut a hole in the hood and put a blower on it... Not too sure about that yet! :)

Anyway, so, what needs to be done that you guys can think of?

Thanks! Bryce
 
A neighbor did one and if I remember correctly it was a bolt in deal with some minor mods to the frame for clearance issues around the oil filter. That does mot include the blower tho.
 
Some things to consider and check out first:

Hoist for the dump on a one ton may not be heavy enough for your two ton truck, or the geometry may be off to give the right dump angle. Need at least 50 degrees to work good. PTO for the pump may not fit the transmission.

Are the tires and wheels the proper size and weight rating? If they are Budd type wheels, is the bolt pattern the same? Not all were.

I think tractorvet has experience putting the 345 in an M. I have a good engine, but don't have an M. YET!

If you can save the IH truck, don't part it out/scrap it! They are rare around here, but tough as nails! Wouldn't mind finding a good one myself!
 
I don't think there is any interchange on the wheels of those trucks. The tire sizes will be 16" vs. 20" and different hole patterns ...
 
They sure do look the same? I am sure that the tires will be the same at least... 8.25-9.00-10.00 x 20 were all pretty common back then on these trucks.

Not sure where you got 16" Wheels? Maybe you don't know that my 1956 is C6400 2 ton truck? Has those big wheels like that.... Bryce
 
Yep, all good questions that I need to ask the guy, if he ever gets back to me...

I can't imagine that it would be too bad to stick the engine in. I am concerned mostly about the flywheel and such. I WANT to be able to wind that thing up and make it scream if I want to! 40 mph down the road sounds kind of interesting too! :p
 
Bryce, I read a good bit on these forums and usually don't reply much, but in this case I'll throw in my .02. I am not sure about what flywheel to use, but if you end up using the stock M flywheel, remember it is cast and wasn't meant to be turned but so many RPM. Go to the pulling board and research this topic for some interesting reading. Some bad things have happened with old cast flywheels at excessive RPM. Not saying it won't work, just be careful and put the right combination in it for what you will be using it for.
 
I agree, have already done a little "looking around" and have heard in several places, that the M's flywheel turns into a bomb at 2400 rpm. I am guessing that the 345 probably turns around 4K? If we cam it, and slow it down a little, we might get it down to 3, or we could really do something stupid with it and get it up to 6!

Oh the joys of having all your own tools.... :)
 
Theres more than just bolting to do that engine swap. You need a good shop and lots of tools and experience cause you are going to make stuff ect. To start with pilot bearing and flywheel to your bell housing and tranny input shaft then radiator fan ect then starter matching flywheel on the 345 and the list goes on. Probably end up with more money spent that rebuilding the Ms engine.
 
A guy I know that put one in a M had to use a belt driven gov. and installed a 3-speed transmission in the torque tube and locked it in 3rd gear.
 
(quoted from post at 08:35:49 04/07/15) So, I am looking at buying a 1967 1 ton International dump truck running and driving. Says that the thing has real good power, good tires, and a dump kit for the flat bed.

I:

Want the dump kit for my 1956 Chevy
Need the tires and one piece wheels for my 1956 Chevy
REALLY want that 345 V8 for my M!

So, how hard is it going to be to stick that 345 into an M? There seem to be lots around online, it certainly isn't unheard of! We are guessing that it will fit right in and bolt up, no issues, BUT, what about the clutch, input shaft, pressure plate? What all needs to be done there?

I haven't looked at the ones online too closely, but it appears that they are using the stock frame rails and sheet metal, which means that the radiator and steering is probably fine. Can't really think of anything else that we would need to check out?

Dad wants to put a 4 barrel Holly and cut a hole in the hood and put a blower on it... Not too sure about that yet! :)

Anyway, so, what needs to be done that you guys can think of?

Thanks! Bryce
Click to expand...

You WILL need to use the M flywheel so you can use the M starter. The starter on the 345 will not fit down into the frame rails.
 
Glad to hear you are replacing the split rims on the Chevy! I'm all for re-using original stuff but I draw the line on those wheels.

The main trick on the swap will be getting the centerline of the 345 crankshaft aligned with the centerline of the M's transmission. Others know more than me on how much bolts up or if you will need to make an adapter plate.
 
That International truck would have had a 7:50 18" tire orignally, had to go up to a ton and a half to get 20" wheels instead of the 18"
 
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