Engine Swap Options:

Discussion in 'The Engine Bay' started by Chevy350Ben, Jan 12, 2021.

  1. Chevy350Ben

    Chevy350Ben Part time mall crawler Premium Member

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    I need some opinions from some of the more seasoned engine guys out there:

    I am no where near ready to pull the trigger on a new drivetrain yet, but someday. Origionaly I wanted a cummins 6bt/4bt to put in the truck (@America.Mike is my hero), just to avoid all the computers and sensors and chit that scares me. But I've been looking for a while now, and even the high mileage pullout motors are going for $3k+. That's before rebuild. So probably 5-8K into the motor before it would be ready to run.

    That's a pretty hard pill to swallow when I've seen some crate motors (turn key) for the same price. Building my own motor is an option, Ive just never done it before. So, just want to get y'alls opinion on crate motors. I don't need a 1200hp fire breathing dragon, but enough low end torque to give my 40's something to whine about.

    Seems like the 383 is the way to go to build low end torque. I'd like to be in the 350-400hp ball park. The less complicated the swap, the better...

    Input? options? companies you have used/would recommend? EFI fuel system recommendations?
     
  2. Bent77

    Bent77 lil meanie Staff Member Moderator GMOTM Winner

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    350 hp is easy to swing

    As for used motors, I also avoided that due to the high price to acquire a good low mileage motor

    If you go LS, get a 6.0 or plan on adding a turbo.
    That said, look for a 7.4 or 8.1. 7.4 burbs are cheap, people literally give them away

    For crate engines ZZ6-EFI or zZ383

    Dont buy a turd. You’ll regret it later
     
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  3. Chevy350Ben

    Chevy350Ben Part time mall crawler Premium Member

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    I've considered the LS swap, but to be brutally honest, all the wires and computers and tuning kinda scares off of it. Im good with gears and oil and metal work, i just havent done enough of the electrical/programming work to feel comfortable that I would get it all right. I've seen 6.0's for okayish prices, but I would want it rebuilt before stuffing it between the fenders, so now we're probably back in the same price ball park as a crate motor.
     
  4. Bent77

    Bent77 lil meanie Staff Member Moderator GMOTM Winner

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    The 6.0 can be fine, and easier if you use the transmission that’s behind it so it doesn’t need that part of the harness reworked
    They have a higher power ban than a SBC. They make more factory power than a SBC, You need to spin them to get to it

    The wiring part isn’t that scary, especially with some of the aftermarket kits as they are simplified vis-a-vis factory wiring

    Keep in mind these trucks run about 6k pounds

    Call or stop by your local engine shop
     
  5. 76zimmer

    76zimmer Flyin Rat Staff Member Moderator GMOTM Winner

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    454-496
    Take out entire drivetrain and replace for the exceptional power!
    Bit seriously what shape is your driveline in now? Is it ready for perhaps double the power of what you have, and those 40” tires?
     
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  6. Chevy350Ben

    Chevy350Ben Part time mall crawler Premium Member

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    Currently has the stock 350 TBI/700 R4/241C.

    As far as axles, I have Dana 60 front, 14BFF rear both geared to 5.38.

    When I do yank the motor/trans, I plan to replace both. Still just in the planning phase but thinking the 4L80 trans behind the motor. still a little fuzzy on all the adapters and frame braces and stuff that will all jive together. Just trying to get my ducks in a row...
     
  7. Bent77

    Bent77 lil meanie Staff Member Moderator GMOTM Winner

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    Skip towards the end for engine stuff
    383 with Edelbrock PF4

    https://ck5.com/forums/threads/here-i-go.335956/
     
  8. Chevy350Ben

    Chevy350Ben Part time mall crawler Premium Member

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  9. Smokinthehippies

    Smokinthehippies 3/4 ton status Premium Member GMOTM Winner

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    Bunch of guys have used them. Some have had great luck. Some have had less great luck. I’m biased as I used to be local to them.

    another option for new old school tech is blueprint. Cant beat their prices for new engines.
     

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