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455 Engine Rebuilder Assemblies- Stock Stroke
Pontiac V8 455 Engine Rebuilder Assemblies- Stock Stroke
462 Cubic Inches Without Stroking It — 455 Engine Rebuilder Assemblies- Stock Stroke for Pontiac V8s
455 Engine Rebuilder Assemblies keep the factory 4.210" stroke and simply put the biggest production Pontiac V8 back together properly. Because the 455 already has the stroke, a stock-stroke rebuild still lands at 462-468 cubic inches — more displacement than most stroker builds on a smaller block.
Butler covers it with a 455 re-ring kit, complete rebuild kits in cast hypereutectic or forged pistons, and a balanced 462-468 ci rotating assembly with Butler/Ross forged pistons, Total Seal rings and in-house balancing.
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1. Which one your teardown calls for
| 455 Re-Ring Kit | Rings, rod bearings, main bearings and a complete engine gasket kit. The right call when the bores and pistons measure good and the engine only needs freshening. |
| 455 Rebuild Kit, cast hypereutectic pistons | A complete Butler-selected package of pistons, rings, bearings and gaskets for a pump-gas street rebuild. |
| 455 Rebuild Kit, forged pistons | The same complete kit with a forged piston, when the 455 is going to see more than stock duty. |
| 462-468 ci balanced rotating assembly, 4.210" stroke | The whole bottom end matched and internally balanced in our shop — crank, rods, pistons, pins, rings and bearings, with the piston shape and compression specified to your heads. |
2. Why a stock-stroke 455 is worth doing
The 455 is the one Pontiac block where the rebuild shelf is already big-inch territory.
| Displacement without an overbore | Bore options start at .030" over so the block cleans up and the rings seat within spec, and the assembly is quoted at 462-468 ci because the finished number moves with that bore. |
| Less cut, more block left | A 455 reaches a given displacement with less overbore than a smaller casting, which leaves more cylinder wall for the next rebuild. |
| The small stroker step | Going from the factory 4.210" to a 4.250" crank adds little on a 455. If you are considering it, do it for the rod and piston package, not for the cubic inches alone. |
3. Getting the order right
| Chamber cc first | Compression on a 455 with a stock-stroke assembly is set by the piston and the head chamber. Tell us the heads and the fuel, and the piston is designed to hit the ratio you want; custom dish pistons run a 10 to 12 week lead time. |
| Hone to the pistons | Have the pistons in hand when the cylinders are honed so piston-to-wall clearance comes off the actual parts. |
| Crank and bearings | Have the crank checked before bearing sizes are chosen. A new cast steel crank is a sound upgrade over a 30-plus-year-old factory piece for street engines without power adders; a 4340 forged crank leaves room to add power later. |
| Balance hardware | A Butler-balanced assembly is internally balanced and needs a neutral-balanced flexplate or flywheel and a neutral harmonic balancer. |
If the block is going out for machine work regardless, price the balanced assembly against the rebuild kit before you decide — you may find the crank, rods and balance work are worth buying together.
Not sure what your Pontiac needs?
Call our tech team at 866-762-7527. Tell us your engine, heads, car, and power goal, and we will put the parts together as one combination that works.