Not Ranked
Maybe 450-possibly less. From a performance standpoint, you have mediocre heads and cam and too little advance. Your compression is probably in the 9.5 range. I'd guess you have the stock iron rockers and shafts.
It was probably a rebuild, certainly not built for serious HP. Use maybe 5200 as a redline; that's probably your HP peak-you don't go there anyway.
Don't change a thing. It's perfect for the way you apparently use it. Sounds like you're not used to big power.
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Chas.
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