Crate Engine Builder Kit by Butler, 450-550hp, 460-474 cu. in. Ready to Assemble
- Butler Performance Engine Builder Kit
- Includes Butler Balanced Rotating Assembly
- 4.250" Stroke Cast or Forged Crank/H-Beam Rods
- Custom machined and ready to assemble
- All engine blocks undergo the "Butler Process"
- Edelbrock Heads and Intake
- Comp Cam and Roller Lifters
- Carb or EFI
- Fully machined and ready to assemble
- Builder Kits are shipped unassembled. Must be assembled by you or your shop
Butler Crate Engine in Builder Kit form- Ready to Assemble
ON PUMP GAS!
Ready to Build Engine Kits
All our ready to assemble crate engine kits leave our shop having been custom designed, put through the "Butler Process", and ready to build. We never simply sell kits with no assistance. You have Butler Performance backing you in every step of the way. From knowledge to tech help, we are here for you or your engine builder of choice. We have worked with many engine shops around the country and are always glad to lend a hand in helping them take the "Butler Kit" to a performance engine specially designed for your project.
Our Butler Crate Engine Builder Kits have the following parts and more
400, 428, or 455 Pontiac Block with Option for 4-Bolt Main With Main Studs upgrade, Dip Stick tube installed
Butler Rotating Assembly- With Crank, H-Beam Rods, Forged Pistons and bearings
Cast or Forged Crank 4.250 Stroke
H-Beam Rods 6.800"
BP Forged Pistons and Pins
Total Seal Rings
C77 Race Bearings
BP Billet Gears and Chains
High Volume Oil Pump
BP/COMP Hyd Roller Cam
Hyd Roller Lifters
BP Custom Pushrods 5/16 .116" Wall
Edelbrock Out of Box Heads
- Carb or EFI of your choice
Stock Type or Canton Oil Pan & Pickup
Port Matched Intake
TPP Valley Pan
Flowkooler Water Pump
New 11 Bolt Timing Cover, Plates, and Sleeves
- Engine Paint and Valve Cover Options
- All gaskets and stainless steel accessory and ARP fasteners
We start with the exact same blocks you would build on your own. It's what we do to take these old dirty blocks that you see here to a beautiful custom built Butler engine. It takes many critical steps in order to become the proper foundation to be a custom Butler Performance engine.
Step 1- 3 Step Cleaning Process
-Baked, Blasted, and Cleaned
Step 2- Visually Inspected
Step 3- Magnafluxed/Sonic Tested
Step 4- Replace Dowel Pins
Step 5- Align Bored (if required)/ Align Honed
Step 6- Bored and Honed with a Torque Plate
***Due to the fact that these 40 plus year old blocks cleanup of cylinders varies on a block to block basis. Therefore your final bore size will be determined at this step. Sufficient wall thickness will be verified once again regardless of final bore size. We will select the smallest bore available for your particular block unless you request a larger bore size/larger cu.in.***
Step 7- Square Decked
Step 8- Deburred/ Final Multi Prep Process
(It takes over a full days work for the final prepping process. Including tapping all bolt holes and cleaning all oil galleys)
Step 9- Final Jet Wash/Cleaning/Wipe Down
Step 10- Ready for Assembly
All rotating assemblies sold by Butler Performance, regardless of brand, are neutrally balanced in our shop by our experienced machinists.
Images show assembled with optional parts. Contact us for detailed quote for your application and specifications.
Drive, accessory pulleys, and March Serpentine systems sold separately
Air cleaner or drop base sold separately
Don't sweat the details. Once order is places one of the Butler Engine Tech's will contact you to finalize any details related to your specific car, application, and final details. Some of these details will be valve cover logo, breather location, and any other parts needed for your specific application. We will answer any questions you may have and get your build processed and in line for machining.
- Butler Performance
- Due to Popular Demand current lead time runs about 16-18 weeks Fully insured shipping will be quoted. (Usually $500-700 on average). Additional fees for residential and liftgate.
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