Your welcome. I just got my build sheet today.

I learned my truck was not originally a flat bed. It was a styleside regular cab. So I will be ordering a new bed for it. Down the road that is.

 

Your welcome. I just got my build sheet today.

I learned my truck was not originally a flat bed. It was a styleside regular cab. So I will be ordering a new bed for it. Down the road that is.

Only took a week for my build sheet to arrive. My trucks bday was Jan 27 1993

 

Order a new bed, huh? Let me know how you make out with that

 

Actually....
The "M" series 351/400M and 385 series 370/429/460 are very different.
Only thing they share is distributor and bellhousing pattern.
Head design is the same canted valve, but the M actually has bore spacing and head bolt pattern of the sbf, being that the heads are based on the 302boss/351c design, and carried forward onto the new truck motor that was replacing the 360fe. 351/400 M share the bearing size of the 351w, but counterweights are bigger because of the long rods of the M. And it uses a sbf flywheel.
The 351/400M is more of a midway between engine, using parts from both sbf and bbf parts bins.

We are trying to compare engines that are not alike completely. How about we just leave it as, they are similar, but differ enough that they don't interchange all the parts.

 

you guys are killing me lol.

no one was drawing any comparisons between the two engines you just did.

i was simply trying to explain the 6.9l is to the 7.3l idi as is the 351M is to the 400 or as the 429 is to the 460.
yes,im well aware the two idi engines are in fact different than simply just crankshafts like either of those.it wasn't an exact comparison.it wasn't meant to be.

my main point is the the 7.3l idi is not a whole design change from the 6.9l.it's simply a updated engine than the original and not a new design.despite the vast amount of parts (of which there are many of over the years,not simply limited to with just when they updated engine displacement) but that the idi engines,the 6.9l and the 7.3l idi's and the 7.3l idi turbo engines,though none of them are identical it's still an idi with no real fundamentals changed from 83-94.
if someone wants to claim the idi's are not the "same" that's fine but the majority of people are going to call the navistar from 83-94 the same basic engine platform.
we can list parts changes all night long (and the 6.9l to 7.3l change would simply be a starting point) but it's not going to turn any year of the idi's into some other platform.the navistar idi went from 1983-1994 with a vast amount of upgrades over the years.
saying anything else is splitting hairs.same and identical are two different words.no one believes the 1983 international n/a 6.9l idi is identical to a 1994 factory turbocharged international 7.3l idi but the fact is,that navistar supplied the same (again,not identical) engine from 1983-1994.this spanned over 3 generations of trucks and this same basic platform lasted for 11 straight years (10.5 the psd - a whole new platform,took over mid yr of '94.you can't use the word same nor identical with this one.)

 

I was quoting brad with his comment of the two engines. I was late to the game and my comment was misplaced in the order of this post. But had to clarify the difference between the two engines, as I would appreciate him doing the same to me if I wasn't completely correct on something I said.
We can all appreciate sending correct info to the next guy, just happens I was late, and it was not of the topic directly related to the original post. Oh well.

 

you misunderstood what I was saying.

What I was saying the the only difference between a 351m and 400m is the 1/2 longer stoke


the only difference between a 429 and 460 is again a 1/2" longer stroke

 

Aaaah. Ok.
351 has 3.5 stroke vs 400 4" stroke....
But 429 is .26 shorter stroke than 460 at 3.59 vs 460s 3.85 stroke.
Close enough I guess.

I'll leave you guys to discuss idi stuff. I'll never own one again probably but I'll keep reading. It may be a good end of civilization engine. Gotta stay current on the thing just in case.