Hey guys. Quick question, i want to do a 531 head swap to by b230f, now i love on USA so really only penta heads available here. My question is, Will the exhaust sleeve in cylinder 4 cause any running issues or does it flow just fine? I will be having machining done to throw larger valves, upgraded springs + retainers, as well as new valve guides and cam upgrade, and just enough decking to true the block mating surface. But will the different port dimensions cause cyl 4 to run somewhat different? if yes how bad?
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