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Mod | | | Forums66 Topics128,048 Posts1,055,626 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Sep 2012 Posts: 103 'Bolter | | 'Bolter Joined: Sep 2012 Posts: 103 | Whats the deal with these engines, Are they good for our trucks, horsepower, durability, torque? The seem compact enough to fit between the rails. What years were they produced and are they still in production?What would be a good trans to bolt up to?
Thanks
Chris | | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | All the info you could ever want about them, including and especialy swapping one into something else. http://www.4btswaps.comDepending on your needs for power thay can be and are great for our trucks. More power than the stock gas engine, peppy in a small truck but I'd say not a hot rod sort of thing in a BigBolt. Grigg | | | | | Joined: Mar 2011 Posts: 667 Shop Shark | | Shop Shark Joined: Mar 2011 Posts: 667 | The 4BTSwap site is definitely the place to go. I'm installing a 4BTAA into my '46 Chevy school bus and it has been a terrific resource.
You'll be amazed at what you can do with that little motor. I'm building mine out as a high reliability, long range, high mpg cruiser. 130hp/335#'s of torque mated to an Allison six-speed auto with a "target" of something near 30mpg. Others have pumped that same little four banger up to over 800HP so it has an incredible range of potential. Just do some homework, decide what you want from it and build it out to what you need. The older, all mechanical (no computers)engines are getting a little harder to find these days, but are much easier to build out & maintain.
Like I said, dig in, read up and I think you'll find out pretty quickly if it fits your plans. Best of luck and keep us posted. | | | | | Joined: Mar 2012 Posts: 211 'Bolter | | 'Bolter Joined: Mar 2012 Posts: 211 | Some bread/frito lay trucks use the 4BT/turbo 400 so you will have the option of useing GM trannies, As Tango said they are getting hard to come by. | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | I used to service the Frito trucks with this engine. They are noisey, smokey, shakey & sluggish. They are stout though.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Dec 2009 Posts: 52 Shop Shark | | Shop Shark Joined: Dec 2009 Posts: 52 | I have one in a 74 C20. I haven't put many miles on it yet as I just changed out the rearend to better suit the diesel. They are noisier than the 6bt, shaky as wrenchbender mentioned, and pretty poky in stock form (mine is the 105 hp version). They have mucho potential as Tango said. I hope to get high 20s fuel mileage on mine. | | |
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