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Big Block or Diesel?
#1400205 Sat Mar 06 2021 04:52 AM
Joined: Feb 2021
Posts: 46
B
Wrench Fetcher
Vehicle topic of discussion
(2 ton Truck, towing 12,000lbs - 20,000lbs max)


Obviously the turbo diesels are torque monsters.

But what's a guy to do that just flat out does not want a diesel?

Will I be happy with 700 or 800 ft. Lbs of torque with a big block?

Or will I be kicking myself in the arse for not going diesel?

Thoughts?


Out with the new, in with the old.
Re: Big Block or Diesel?
BignScar #1400207 Sat Mar 06 2021 06:32 AM
Joined: Apr 2005
Posts: 2,806
C
'Bolter
The only way you get 700-800 torque out of a big block is to turbocharge. The 502 crate engine has a high of 560 torque so 454's are wimps for sure. Combine this with 8-9 mpg and maybe a diesel isn't so bad. If one stays gas and turbocharges then an LSX crate engine makes 835hp and 760 torque plus will get double the fuel mileage of a big block.


Evan
Re: Big Block or Diesel?
BignScar #1400215 Sat Mar 06 2021 11:20 AM
Joined: Jul 2019
Posts: 530
B
'Bolter
I’ve always driven diesel cars and trucks as daily’s and love them. I normally don’t recommend diesel swaps though unless someone actually needs one. Im a big fan of LS truck engines from the junkyard but in your case I would say your best bet would be go buy a complete duramax van or 2500 truck and use the entire drivetrain. Ive seen all the swaps and driven all the popular ones from 12valves to 24 to 7.3’s(i own) to duramax and the d-max is kinda great at everything and gets great mileage and will do everything you want in your 2 ton. Me and a friend put one in a c10 project truck a few years ago. Its currently pushed in the corner waiting finishing because of other projects but i will say its a pretty nice setup and i was happy with how compact it was for what it is.

Re: Big Block or Diesel?
BignScar #1400224 Sat Mar 06 2021 01:42 PM
Joined: Feb 2016
Posts: 526
7
'Bolter
In my prior life I worked for a local beer distributor. In the 20+ years of driving we had mostly GM 5000, 6000, 7000 series trucks with 427's, 5 speed x 2 speed. These were plated at 24,000 to 32,000 lbs. Lots of heavy use and short trips in the county - pulled very well. The company then changed over to diesel and we had Caterpillar 3208's and 3116's, 6 speed but I can't remember if some had 2 speed rears. Then they changed to International's with IH 466 diesel with straight 6 speeds/single speed rear. A lot of variables here but they all were designed to pull a decent load. The OTR stuff that I drove of course was a horse of a different color - we max'd out at 80,000 lbs. each night pulling out of the Columbus brew house and headed north. A lot to think about when you are trying to build a truck for a specific job but I thought I would add my 2 cents.


1957 Chevrolet 5700 LCF 283 SM420 single speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto
Re: Big Block or Diesel?
BignScar #1400343 Sun Mar 07 2021 05:41 AM
Joined: Feb 2021
Posts: 46
B
Wrench Fetcher
Ya, it just sounds like diesel is the only way to go for my swap. Appreciate the input guys.


Out with the new, in with the old.
Re: Big Block or Diesel?
BignScar #1400345 Sun Mar 07 2021 06:25 AM
Joined: Apr 2016
Posts: 643
M
'Bolter
i went with the big gas engine in my F^*d. It gets cold up here and I travel a lot without easy access to plugging it in at hotels and the like. Also knowing whatever Podunk station I stop at will have gas. I know it cost me more in fuel but I just like the convivence of a gas engine When on the road.


Old enough to know better, too young to resist.
Re: Big Block or Diesel?
BignScar #1400347 Sun Mar 07 2021 07:17 AM
Joined: Apr 2005
Posts: 2,806
C
'Bolter
The 427 we put in a 37 Chevy worked very well but it had a roll back bed and only hauled a 37 Chevy Business Coupe to races and shows. A 54 2T got a turboed Cummins and is a beast. Diesel better for load pulling.

427 in 37 Chevy Roll Back:
[img]https://i.postimg.cc/47y9f7F0/37-Hauler-Don-s-for-sale-86-005.jpg[/img] [postimg.cc]

Cummins in 54 2T
[img]https://i.postimg.cc/2q66hpFb/IMG-4400.jpg[/img] [postimg.cc]


Evan
Re: Big Block or Diesel?
BignScar #1400366 Sun Mar 07 2021 02:17 PM
Joined: Mar 2008
Posts: 2,022
W
'Bolter
Have you given a chassis swap any thoughts? An Isuzu NPR or retired school bus chassis may give you everything you need/want. Better chassis, better brakes, better, gearing, complete drivetrain.


1954 3600 Chevy Truck
"The Fake Truck"
In the Stovebolt Gallery
More pix on Photobucket
Re: Big Block or Diesel?
Whitedog #1400448 Sun Mar 07 2021 11:50 PM
Joined: Feb 2021
Posts: 46
B
Wrench Fetcher
Originally Posted by Whitedog
Have you given a chassis swap any thoughts? An Isuzu NPR or retired school bus chassis may give you everything you need/want. Better chassis, better brakes, better, gearing, complete drivetrain.
I have, it gets suggested a lot for good reasons.
Not an option for me at this point doing my build 300$ at a time on a budget.
It still might happen, never know a year or two down the road.


Out with the new, in with the old.
Re: Big Block or Diesel?
BignScar #1401958 Fri Mar 19 2021 01:47 AM
Joined: Jul 2019
Posts: 530
B
'Bolter
For all the work you will be doing and odds and ends to adapt it just look around. I just found like 4 npr trucks that run and drive on marketplace for under 5k. In the long run its gonna definitely be cheaper with a much better outcome. I do totally see how you will get more done with existing parts and $300 at a time but if you save up and spend 4-5k on a chassis that’s already driving and has good power, brakes, axles, complete drivetrain made to just do everything your asking......well you get what i mean when i say you will be ahead.

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