Jim, you can port some heads. Those are VERY good numbers for what it is. Numbers like "pump gas 600HP E heads" get only with bigger cams.
I have a iron headed TRW 455 that does good. Same 9.3 CR but with round port HOs. About 570HP by weight/ET/MPH. But with bigger solid roller that is not very streetable.
People can seem to give away those 6 X-8s. Just gave them a reason to think about builds with them. I have a set given to me.
Again, nice job.
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