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Old 04-05-2018, 02:04 PM
FlatbedCowboy FlatbedCowboy is offline
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Default Need help deciding on which diesel to swap

So I was just given a 1968 International Loadstar 1600. It has a bad engine and has been sitting forever, but as odd as I am I love the look of the old beast.

My plans are to take the cab off the frame and turn the frame/flatbed into a trailer. Its a dump bed, so I plan on making that work with my tractor and use the trailer as a utility trailer around the ranch.

I would like to take the cab and put it onto an excising truck frame and engine platform. I want something equivalent to a F450 or 1.5 ton running gear but at a minimum I will want a dually. I would like to not do a cummins, because of the cost.

I have instant access to 2 different 7.3Ls. One is a 1995 F350 with 299K and has a starting problem and the other is a 1996 with 180K but has been used super hard its whole life (former construction truck). Both these trucks I could get for under $2000 easy. Im not super hot on using one of these though as they take quite of bit of cash to make any power, are non-intercooled, and slow.

The other trucks I have been looking at online are 1990s-2000 6.5L GMC 3500HD trucks. I like the fact that they have larger frames, are 10 lug, and cheap-ish. But I have read that they are dogs and super slow.

I want this to be like a highway trailer totter that would get used a dozen times a year to pull loads of around 16K. I would like to do at least 70 mph ( I know gearing helps but you have to have power to get it rolling). I also want to lower it as low as I can to the ground so 2wd is preferred. Also CHEAP is what Im after.

Any other ideas that will help guide my search for a suitable donor?

Thanks
  #2  
Old 04-05-2018, 04:20 PM
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gwunter gwunter is offline
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Dt360 or 466 and get this party started!!
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Old 04-05-2018, 04:32 PM
threegenpowerstroke98 threegenpowerstroke98 is offline
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What he said, a dt swap can be a fair bit cheaper than a cummins swap, and a 466 would fit in that ih hood nicely and big good power and gobs of torques with basic mods like pump tuning and a turbo. Are the 7.3s manuals or autos? The 7.3 with some basic mods like stage one injectors, tunes maybe turbo etc could be a good powerhouse. I wouldn't bother with the 6.5, 7.3 runs laps around them all day imo.
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  #4  
Old 04-06-2018, 06:32 AM
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dont even consider those old GM engineering disasters. They were some of the worst work trucks to ever grace the pavement.
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Old 04-06-2018, 09:58 AM
FlatbedCowboy FlatbedCowboy is offline
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I would like a DT360 but those are harder then hens teeth to find around here. I think the closest large truck salvage yard to me is like 4 hours away.

My main problem is the whole drivetrain/suspention/frame etc is completely shot on the loadstar. Least shot enough I dont want to use the current setup. Thats why Im thinking I need a whole donor to just swap cabs with.

Last edited by FlatbedCowboy; 04-06-2018 at 10:04 AM.
  #6  
Old 04-06-2018, 10:04 AM
FlatbedCowboy FlatbedCowboy is offline
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Quote:
Originally Posted by threegenpowerstroke98 View Post
Are the 7.3s manuals or autos? The 7.3 with some basic mods like stage one injectors, tunes maybe turbo etc could be a good powerhouse. I wouldn't bother with the 6.5, 7.3 runs laps around them all day imo.
The 299k one is auto, the other is a 5spd.

I had a '99 7.3L before it burned to the ground, so i know how to work on them, but once you start with mods it never ends it seems. It seems the horsepower return on cash investment is marginal.

But Im thinking since the 5spd is also a 4 door long bed, that would give me the long frame look Im after. When I drive it though, it just feels plain wore out and top speed towing with it is like 62mph.....

But maybe by the time I swap it all over Ill have found a better engine
  #7  
Old 04-06-2018, 02:39 PM
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What region are you from?
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Old 04-07-2018, 08:16 AM
FlatbedCowboy FlatbedCowboy is offline
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Quote:
Originally Posted by gwunter View Post
What region are you from?
Im in southwestern Idaho, Im about an hour west of Boise
  #9  
Old 04-07-2018, 10:32 AM
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Quote:
Originally Posted by FlatbedCowboy View Post
The 299k one is auto, the other is a 5spd.

I had a '99 7.3L before it burned to the ground, so i know how to work on them, but once you start with mods it never ends it seems. It seems the horsepower return on cash investment is marginal.

But Im thinking since the 5spd is also a 4 door long bed, that would give me the long frame look Im after. When I drive it though, it just feels plain wore out and top speed towing with it is like 62mph.....

But maybe by the time I swap it all over Ill have found a better engine
That truck that feels worn out with low top speed, probably has 4:10 gears, with a 5 speed, right? Not worth a damn for highway driving. Those gears are the issue.
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  #10  
Old 04-08-2018, 06:40 PM
FlatbedCowboy FlatbedCowboy is offline
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Right, I know the 5spd sucks it always feels like I needed one more gear. My burned up truck had 4.10s and was a dually also but seemed to at least get along the highway half decent. Maybe it's just cause it's an obs vs the 99+ engine
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