Time to replace my engine. what should i go with.

Discussion in 'Chevy C/K Truck Forum' started by possum144, Oct 6, 2011.

  1. possum144

    possum144 New Member

    I have a 1983 K20 4x4 with a stock 350. I'm looking at upgrading to either a newer 6.0 or a 6 gen 454. Also what do you guys think I should do with the transmission A/T or M/T? I'm new to Chevy but have been working on Toyota's trucks for years. Also if anyone has done any one of the conversions what should I know about do a project like this before I start.
  2. TRPLXL2

    TRPLXL2 Epic Member 5+ Years 1000 Posts

    In your case it would be kind of tricky, mainly that yours is really old school obd1 so I am not familiar with it that far back. I have a firebird that is an obd2 system and I swapped in a obd1 LT1 drivetrain and it's the most reliable thing I own believe it or not. There is nothing to it mechanically, BUT I hope your wiring skills are good because it's quite a job. The most expensive part of an LS engine is the acessories on the front of the engine, and the adapters that would be needed to fit it into your truck. Anything can be done, it just depends on how bad you want it.
  3. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    I'd go with a 6.0 with a 4L80E transmission. Theres numerous companies that have wiring harness and ECM's.
  4. Caddiac

    Caddiac Epic Member 5+ Years 1000 Posts

    What she said.
  5. possum144

    possum144 New Member

    What year should I get the 6.0 out of? And is there any one that is better then the other. Also what company has wiring harness and ecu.
  6. TRPLXL2

    TRPLXL2 Epic Member 5+ Years 1000 Posts

    As far as wiring I had a horrible experience with PAINLESS WIRING!!!!!!!!!!

    I bought the supposed 94-97' LT1 kit which was $800.00 at summit racing, Painless told me it was an exact match to the factory harness which got fried by my long tube headers lol! Well when I got this kit home and opened it up I about screamed, all it amounted to was a universal harness with LT1 connectors on it and a stand alone fuse box and all kinds of crap! I returned it and even the summit racing guy said it was a shoddy kit, I ended up buying a used harness out of a 94' Z28 for $200 and it worked like a charm.

    Your better off buying a factory used harness for your engine and modifying for your situation, just my opinion......
  7. Boonduff

    Boonduff Rockstar 4 Years 100 Posts

    Howell Fuel Injection offers very high quality wiring harnesses. If you can get the entire factory harness with the swapped in motor Hot Wire Auto offers a service where you send them the factory harness from your truck and the harness from your swapped in motor and they splice them together and remove any unused plugs and wires. It will be pretty much a plug and play harness.
  8. chico

    chico New Member

    There are other options,I went with a crate 383 tbi engine from ATK nice engine for $3300 with 320hp and no wiring problems .
  9. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    X2 on the Howell Fuel Injection harness. Bill Howell was a engineer at GM that helped design todays f/i system. If you buy a used 6.0 make sure you get a truck 6.0. Make sure you get a 2001 up. '01 is when they went to the LS1 cam. '99 and '00 have the same cam as the 5.3's. Also the trucks 6.0 crank has a thicker real crank flange, where the flywheel bolts to ,than the car cranks.
  10. possum144

    possum144 New Member

    How much would a 6.0L cost and where is the best places to look for them? Also should i get the transmission that comes with the engine? Will a dana 60 take the HP of the 6.0L.

    ---------- Post added at 09:16 PM ---------- Previous post was at 09:14 PM ----------

    what is the difference from the between a LS1 and LS2 is it just the years?

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