F700 7.3 swap

[meanmoline]

Hello all, I am new here. Thank you in advance for any help and information.
So what I have is a F700 with a stuck gasser. Been running 7.3 PS for the past 15 years or so, I’ve come to appreciate the efficiency and reliability of these diesels. So here goes I want to swap a believed 360 with a 7.3 idi. The truck has a believed Clark 285v 5 speed in it. I have had a bit of trouble finding out what I actually have. Here are some numbers
F70EVC85493
WB 212 color LC type F703 body 4A8 trans M ax E1M give 23000
The info and help I need is what parts, adapter, ect I will need. Been a mechanic most of my life just not on cars or trucks. Thanks again you all have been a lot of help already.

 

[meanmoline]

By the way I have read some other posts and find you all to be so much more respectful to each other, you just don’t find that a lot in other forums. I just thought you all should know.

 

[IDIBRONCO]

By the way I have read some other posts and find you all to be so much more respectful to each other, you just don’t find that a lot in other forums. I just thought you all should know.

Welcome. I feel that this is the best forum for the IDI engines too. The admins here usually get rid of the jerks (to keep it family rated) pretty quickly. There's a lot of knowledge here. I'm looking forward to seeing your progress. What year is your F700? It may be a 360. I also know that they used a 392(I think ) Industrial engine. I believe that this was along the same lines as the FE series like the 360 was. I could be wrong on that one. This is a possibility too. I think these were used in the 70's. I don't know about the larger F series trucks, bit I do know that both the 6.9IDI and 7.3IDI were used in S1600 series Internationals. Maybe some of these parts like motor mounts would work for you.

 

[carsonlhammond]

I really like how respectful and helpful everyone one here has been as well. Honestly I think you’d be better off finding a wide ratio zf5 (for the lower first gear). Although I have a 1990 7.3 with a close ratio zf5 in a dump truck and a service truck that we swapped out the close for a wide and I can say that either one is still usable in a medium duty truck. I think all the trouble to make the Clark work wouldn’t be worth it. The hydraulic master isn’t hard to make work on these old ford mechanical clutches. I can post some pics of how I did the one in my 75 F250 if you’d like.

 

[Garbage_Mechan]

My first fleet job we had garbage trucks with that engine series. I built a few. They are part of the FE series but have heavier duty things like crank, oil pump drive sodium filled valves etc. The sizes were 330, 361 and 391. If I were doing this I would look at an International T444 (7.3 PSD) engine with stand alone computer. There were also 2000 to 2003 F700 with Powerstroke 7.3 Not as common as International S1600. That Clark trans seemed pretty tough, synchros didn’t stand up to thousands of rough shifts a day but given the overloading and rough use they were ok. Comparing the front end of the Clark to trans that we’re available with the 7.3 starts that part off. If

 

[Garbage_Mechan]

Also....agreed this is one of the most helpful low BS forums around! Thanks everyone!

 

[meanmoline]

I’d like to keep the believed Clark 285v I’m not 100 on that is what it is, but the parking brake is on it and it is the original to the truck, I want to keep this swap bell house forward trans back is good. It just happens the 360/390 is stuck more than I really want to deal with. The ol 700 will be wearing some work boots when finished so I really don’t want to go zf route. By the way The cast number on the trans is 230790 C5 A

 

[meanmoline]

So keeping with original trans does anyone know if there was an adapter plate for the 6.9 to Clark that would fit 7.3 or adapter plate bell house combo that would work? I’m still leaning ******* a 7.3 idi I have one found, I kinda like the low tech for this rig it needs to be the one that can be risen from the dead on a Sunday morning I have no parts houses on sunday

 

[meanmoline]

Just curious if anyone had a good way to find out exactly what trans I have I’m still having trouble running numbers
Truck is f70evc85493 trans type is m
I’m not happy with the new vin codes seems you need newer stuff to get good numbers on anything arrgh

 

[Randy Bush]

I’d like to keep the believed Clark 285v I’m not 100 on that is what it is, but the parking brake is on it and it is the original to the truck, I want to keep this swap bell house forward trans back is good. It just happens the 360/390 is stuck more than I really want to deal with. The ol 700 will be wearing some work boots when finished so I really don’t want to go zf route. By the way The cast number on the trans is 230790 C5 A

Yours will have a 361 or 391 , 360s where used in pickup and to the bet of my knowledge 390 was only a car engine although a lot got put in pickups after the fact. Do you have just an standard bellhousing now or an SAE one to the transmission. I think one of the bigger things is if the input shaft is going to be the right size and length.

 

[Randy Bush]

Clark 5 speed to 6.9? Might be some information on this thread here that might be of help to you,

 

[meanmoline]

From what I have seen the 7.3 and 6.9 share the same bells, I am just not sure what bell I should be looking for I was hoping there would be an existing 6.9 Clark combo that would work

 

[carsonlhammond]

To the best of my knowledge you’re going to have a hell of a time with the Clark to idi combo. The best you could hope for is that the bellhousing where it bolts to the trans is the same as a np435 or t18/19 4 speed then you could swap the bellhousing from a 6.9 4speed truck and hopefully that would set the input shaft at the correct distance to use the stock dual mass flywheel and pressure plate from 7.3. Utilizing a 6.9 friction plate. You could also convert to a solid mass flywheel for the 7.3 balance I believe. Now you also need to check the diameter for the input shaft cause it might be bigger then the 4 speed setup being in a medium duty truck(possibly same as the zf???)In that case you could possibly use the single mass flywheel/clutch conversation kits available for 7.3’s from luk and a few others I believe. Now this would still leave you with having to convert to a hydraulic clutch system since the 4spd 6.9’s use this system. Just my thoughts on what I’d do.

 

[snicklas]

Look for a 26 foot u-haul in the scrapyard. Look for one that’s an IH S1600 chassis. IH used a 6.9/7.3 IDI / Clark 5 speed combo. I drove one in the mid 90’s. That would be the easiest way to mate an IDI with a Clark.

 

[meanmoline]

I am kinda thinking I might have to pull the ol gasser out so I can see what I have. Would it be a possible I could use the friction plate I have or are we talking different diameters or will I have some clearance issues?