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73 super 30 motorhome 'Ol Mitch. CUMMINS. 08/08/2018 IT MOVES!

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POORBOYK5

POORBOYK5

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POORBOYK5 submitted a new Build:

73 super 30 motorhome 'Ol Mitch. CUMMINS.

While I should have been putting in the extra time on paying customer work to pay down debt or get ahead..... I tell myself I want an RV. I've been camping out of my Express van for about 4 years. It works, but I wanted a little more.

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SO while cruising craigslist one afternoon, I run across this 1973 Chevy Cheyenne Super 30 with a Chassis mount Mitchell and sons Camper attached. I should have never went and looked at it. I should have told myself, "that's nice" and kept cruising.. But I went and had a look and that was it. I HAD to have it. It ran and drove.... poorly for only having 57,000 on the clock. I figured the long periods of sitting had the carb and tune up in need of attention. I got it back to the shop, tuned it up, threw a known good replacement qjet on it and NOTHING changed.... uh oh.. Long story short, motor was no good.

Anyway here's some more pics for you pic whores. interior was pretty nice for a 73....
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It has not one, but TWO 8 track players! Flippen Sweet!

Upon diggin a little deeper in to the old girl, I found there was some water damage in the over-cab portion, so I called on a friend of mine for a little help.

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got all the new frame work in, still in the process of finish/trim.

In the meantime, I was debating on what I should do about the motor... pull this one and fix it, find a donor or do the ultimate cummins swap.. The timing worked out perfect where a complete donor motor and trans came along. I was able to pull a complete 5.9 6bt and a 618 trans out of a 1992 2wd D250 dodge with 130K!
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Finally, this weekend I was able to get the RV front clip off with some help and get the 454/th400 out and the new power plant set in!

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Out with the old, in with the new..
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It was absolutely crazy how easy it was to get the Cummins mounted in there. The 1st gen mounts are the exact angle of the GM frame mounts. I swapped the dodge mounts from side to side to move them back about 1.5" and set it down!

I used some industrial rubber pieces I had around as insulators. It's pretty rugged stuff, we'll see how it holds up....
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Read more about this build here...
 
That's badass. That is a super clean truck to start with.
What rear axle ratio does it have?
 
nice build up project .

if that 454 is like mine from that era it prob has a flat cam .

also it should have 049 or 781 large oval port heads .
 
sweetk30 said:
nice build up project .

if that 454 is like mine from that era it prob has a flat cam .

also it should have 049 or 781 large oval port heads .
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It has some massive blow by. I'll tear into it one day. I agree it should be large oval port.

obijuank5 said:
That's badass. That is a super clean truck to start with.
What rear axle ratio does it have?
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It is pretty damn clean. That's what convinced me to get it. And now I'm even more pumped about it with the cummins swap. Has 4.56 rear, so the overdrive of the A618 will be nice to compensate for the lower RPM that the diesel will run. I may even get to haul the Blazer with it if I ever get it back together. maybe BB2019 or dunefest 2019??
 
4.56 is going to be screaming at 2400rpm at 70. 3.73 would be 1950 at 70 with 31" tires.

As it is you get 59mph at 2000 rpm.
The sweet spot is between 18 and 20 on the tach.
 
Justin V said:
The jealousy is strong with this one...
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this all happened so fast and easy, I'm almost jealous of it myself... reality hasn't set in that I have this and that its actually happening. Haha.

obijuank5 said:
4.56 is going to be screaming at 2400rpm at 70. 3.73 would be 1950 at 70 with 31" tires.

As it is you get 59mph at 2000 rpm.
The sweet spot is between 18 and 20 on the tach.
Click to expand...

The way it is now wont be bad for a little while. I'll be taking some trips up in the mountains once its ready to roll. once I've got the bugs worked out, I might go 3.73. Did you calculate this with the overdrive of the 618?
 
You know the frames are the same as a 4x4. Wouldn't be that hard to throw a front axle under there. My '81 C30 crew cab dually will eventually get a 4x4 front end and a divorce mount 205 I have laying around.
 
Truckman4life said:
You know the frames are the same as a 4x4. Wouldn't be that hard to throw a front axle under there. My '81 C30 crew cab dually will eventually get a 4x4 front end and a divorce mount 205 I have laying around.
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I considered it. But for 4wd, I have 5 true K30 trucks, one ton swapped sub and k5, 2 K20's, 2 4wd (Dodge) 1st gen cummins and a 79 F350 4x4. This will stay 2wd. Not many places I'd be comfortable taking this where 4wd would be required..:D Hopefully the K5 will be in tow for any of that stuff.
 
I like the crew cab version of those.. and payed out like that would be sweet lol
 
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