New Engines: 557 or 572
#47
Re: New Engines: 557 or 572
Originally Posted by AIR TIME
Is the 4.25 the stock crank and I would change the stroke and pistons only. to get 548?
#50
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Re: New Engines: 557 or 572
Originally Posted by GPM
Which bore 4.5 or 4.6 has less head gasket issues?
What RPM's are most builders comfortable with on a 4.5 stroke 1000+ hp motor. For sustained length runs.