Dynoed my cheap 383

Babyblue66 said

But seems like a very mild build to me, for basically 1 hp per cu in.

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Did you end up with new valve seats to go from the 1.60 to the 1.74 valve..?? I have a pretty comprable build in a 71 swinger 3.91, 4 speed car. Still has 1.60 valves, just curious what the difference might be….Thanks Swingn’