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Discussion Starter #1
I'm a little ahead of myself on this build.:) The the plan is to stuff this 6V71 into a 2005 Ford F550 frame and drop the cab down and make a 50's style Peterbilt pickup. The transmission will most likely be an RTO-9513 or possibly a 6x4 trans setup. Still mocking things up and lots to think about but thought I would share this build.:) The cab is a 2000 Peterbilt 378 and the engine is a 1958 Detroit 6V71. I'll slowly collect the needed components over the next 6 months and get going on it by the end of next summer. Lot's of thinking and designing to do before I search for the right frame.:) Should be a lot of fun.:) Here's a video of loading the cab and some pictures.


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I believe you've caught Detroit fever. LOL. A 6V71 weighs 2380 lbs. That's quite a bit for an F550 chassis. Generally think more of a F650 for something that big and heavy. Will be an interesting project.
 

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I believe you've caught Detroit fever. LOL. A 6V71 weighs 2380 lbs. That's quite a bit for an F550 chassis. Generally think more of a F650 for something that big and heavy. Will be an interesting project.
I think you're right, and then add on the RTO-9513 and now we're at 3050.:)
 

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Your cab might fit the F650 better as well. Are you planning 2wd or 4wd? The F650 came both ways. Believe they used a Marmon/Herrington front axle. Just for info, Ford offered a Marmon/Herrington front axle on the F Superduty (F450) trucks which had an 8000 lb load rating. That was the lightest duty axle M/H makes. In all my years I never saw one. That axle and transfer case may have cost half as much as the truck. It was a dealer installed option. There were variations in the F550 trucks as well. Early ones ('99-03) had the Dana S135 rear axle which is probably as strong or stronger that the F650. It was a monster of an axle for that size truck. They later downgraded it to a Dana S110. The main drawback of the S135 was the lack a higher gear ratios but now your can get a 4.11 which wouldn't be too bad.
 

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Your cab might fit the F650 better as well. Are you planning 2wd or 4wd? The F650 came both ways. Believe they used a Marmon/Herrington front axle. Just for info, Ford offered a Marmon/Herrington front axle on the F Superduty (F450) trucks which had an 8000 lb load rating. That was the lightest duty axle M/H makes. In all my years I never saw one. That axle and transfer case may have cost half as much as the truck. It was a dealer installed option. There were variations in the F550 trucks as well. Early ones ('99-03) had the Dana S135 rear axle which is probably as strong or stronger that the F650. It was a monster of an axle for that size truck. They later downgraded it to a Dana S110. The main drawback of the S135 was the lack a higher gear ratios but now your can get a 4.11 which wouldn't be too bad.
Thanks, I think you're right.:) At this point I'm looking at weight ratings of the f550 vs 650 and there is no comparison. I still have to look at the frame dimensions on the F550 and see if the #1 flywheel housing and the RTO-9513 will fit? The chassis cab frames are pretty narrow from what I remember. Lot's of planning before I go and get a frame.:)
 

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An SAE1 bellhousing is only 21.75" in width so that shouldn't be an issue. Now the transmission might require some tunnel work. We had a member who did a 4-71 turbo in a Chevy 3500. He even had the aluminum block to save weight. His engine was literally brand new assembled from parts. Here's a link to that build. ARAMP1's Ultimate TowRig Build Thread Haven't heard from him in a while. He was in the US Air Force when he started this project, then had twin boys, then moved to another state, and finally got out and I believe went to work flying for FedEx.
 

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Discussion Starter #11
Spent a little time working on my 6V71 and am one step closer to hearing it run. I rebuilt one of my Delco Remy 42MT that came with a 4-53T I bought as a spare. It's bench tested and installed on the engine. Now onto the fuel system as the engine has not been run since 1995, so all the injectors are stuck. I also have to add fuel lines, filter, fuel pump, convert the governor to a limited speed governor.
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Worked on the 6V71 today and got the governor spring cleaned up and installed in the governor housing. Pulled and freed up two of the six injectors. Not far from getting this beauty running.:)
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Spent some more time working on Jimmy and have all the injectors freed up now. I have him ready to talk and with any luck he's a keeper. It's been 25 years of silence for the old Detroit, so looking forward to seeing him run. Happy Detroit.:)

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Discussion Starter #14
Fixed Jimmy's starter and got him running today. Runs great, just have to change out one injector and that's it.
 
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