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Which engine?

Discussion in 'Chevy Trucks' started by Beater_K20, Jan 19, 2014.

  1. Beater_K20

    Beater_K20 Member
    Messages: 65

    After being without a plow (though I still own one) since 2010, and the recent mass amounts of snow, I need to come up with something.

    Building on my 80 K2500 frame, I'll be installing a Gmt400 body and a flatbed. Trans will be a 4L80E, backed by an NP241. The plow setup will be my trusty Western standard mount 7.5 with a set of wings installed.

    I have 2 choices for an engine. I have an L19 454, or a Vortec 5.7. Whichever engine I choose, it will be fed by the same 454 TBI setup, as that will be the easiest route since I have the complete 454/80e harness and injection system from the 80e donor.

    Which would you prefer to run, and why?
  2. 2006Sierra1500

    2006Sierra1500 PlowSite.com Addict
    Messages: 1,758

    The TBI 454 and Vortec 350 are about equal, the SBC holds up much better however. 454s are prone to cracks under high stress when a 350 will just keep going, and going, and going.
  3. gmcdan

    gmcdan Senior Member
    Messages: 107

    never heard that 454s were prone to cracks, where do they crack?
  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,739

    The tbi 454 will be a gas hog!!! Can you get the wiring for a port injection instead? If not I'd go with the 350
  5. Beater_K20

    Beater_K20 Member
    Messages: 65

    Actually, in my experience, when unloaded, both will do about the same for fuel economy. When running properly, in a heavy truck, that is properly geared, the 454 will get better fuel economy. I have seen the exact injection system and trans i will be installing get 14mpg with a 454 and 4.10 gears... In a loaded crewcab dually. The 454 will get 3.73 gears, and the 350 will get 4.10s.

    There were other replies to this thread, but it appears that they have been deleted. Is it common for mods to delete posts with no notification or reasoning here?
    Last edited: Jan 21, 2014
  6. sameoldthang

    sameoldthang Member
    Messages: 34


    I have an 80 K30 with a 4.56 rear and a turbo 400, NP205. I built a 1990 small block 350. Friend of mine works at a machine shop and I had .020 decked off the block and used a dish piston set for 75$ shipped and a very thin head gasket .026 quench of .034. I had a k1102 cam laying around along with 96-00 vortec heads . I bought a intake off ebay that works with those heads and a spreadbore adapter. Its quite healthy and had no problem pushing a foot of snow around and great low end torque, not bad on gas but who keeps track on something like that.