Iv`e got my 455 with the factory crank, RPM I beam 4340 rods, and Ross piston. This thing goes to 6500 with my combo. No need to "stroke" to 4.25 IMO. It also keeps the piston pin out of the ring pack better with the 6.625 rod in a street app.
After that, I will leave it to the shaker guys to find the best combo for fitment. Cam, heads and intake, air cleaner, have to work together. So, you would have to put together a "shaker" package for your needs.
Your choices would be wider outside of the shaker system.
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