* Blocks are tanked/fluxed, then Shot Peened, usually bored to 3-5/16" or 3-3/8", Merc 4" Cranks (or larger!) are utilized whenever possible
* Most blocks will receive a slight Relief (sharp edges taken down)
* Intake runners are (HEAVILY) Ported Out and Polished
* Blocks are drilled/plugged for Full Flow Oil
* All New Bearings
* New Egge or Ross Forged Pistons, typically Grant or chrome molly rings
* Many 3/4 or Full Race cams are available.
* New Adjustable Lifters, New Guides/locks/keepers
* New Stainless Hi-Flow valves
* New 30 or 45 degree Seats, and 2 or 3-angle valve jobs if desired
* New Isky single valve springs
* New Aluminum Timing Gears
* Vintage Intakes are used whenever possible!, Polished if desired, Port-Matched, 2, 3, or 4-deuce, Or if you have an Intake of your own you'd like to use just let us know!
* Rebuilt Holley '94's, power valves in front, plugs in back, Linkage Included
* Rebuilt Original '97's or New '97's are available upon request
* Rebuilt Fuel Pumps if desired
* New Polished Aluminum Heads, Sharp 59A style, Offy, Edelbrock, Baron, Flatattack, Navarro, Cyclone, 59A or 8BA style
* New ball bearing Water Pumps, car or truck style
* New Pertronix Ignition, Mallory dual points, Electronic, and MSD Distributors available
* New Plug wires/looms/platnum plugs
* Rebuilt 12Volt Generators if desired or Alternators
* Truck or Car oil pans depending upon application
* Exclusive Go Cat Speedshop Polished Carb Scoops with washable filters
* All New Bolts and even the Belts!!!
* Blocks can be painted in Any hi-temp Color you wish
* Engines are run and tested on a run-in-stand
All Go Cat Flatheads are meticulously built and are Show Condition 100% ready for you to drop into your current vehicle or future project, Just bolt them to any Transmission you decide, 3/4/5-spd, C-4, AOD...
There is absolutely NOTHING on this planet like the sound and Torque of a "Built" Flathead!
All of our Engines are fully Crated on pallets and can be Shipped Anywhere.
We can build you anything from a stock 239 to a 304, and much larger.
Now offering 8BA "Short Block" 276 cubic inch Mercs
* '49 to '53 8BA Blocks, Ported out, Full-Flow Oil Systems
* Blocks are tanked/fluxed/decked/line honed/new seats/bored to 3-5/16"
* Freshly Turned/Cleaned/re-plugged Mercury 4" Cranks
* New Bearings: Cam, Mains & Rods
* Recon'd 8BA Rods (New small-end bushings, big-ends honed)
* New Egge 3-5/16" x 4" Pistons, New Grant Rings
* Crank/Rods/Pistons BALANCED
* Seats re-cut to a fresh 45 or replaced
* New 1.5 hi-grade stainless valves
* New Guides/Locks/Retainers/Clips
* New Isky Valve Springs
* New Egge Adjustable Lifters, gapped twice through
* New Oil Pump, tube and screen
* Your Choice of Camshaft (several 3/4's or Full Race Cams Available)
* New Aluminum Timing Gear, New 1-pc Front Seal
* New 'ball bearing' style Water Pumps, Any Type
* Timing Cover
* New "Best" brand Gaskets
* New Hi-Torque Mini-Stater Included !
* You Chose the Oil Pan (car or truck & year if needs to be specific), and Paint Color
These Custom Short Blocks don't last long, this is your chance to jump start that new project you've been putting off or replace your tired Flatty with a Fresh New one that'll run cool and have MUCH MORE Horsepower and Torque than your stocker!
Or if you want one Finished out with Heads, Intake, Carbs, Scoops, etc...
Email us so we can build you a Complete Flathead.
Add VALUE to your Current Hot Rod or Future Project!
Here's some recent Go Cat Speedshop Examples
Full Race 276 Merc
