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I have a "high speed" AA that I enjoy driving around town. I realize this is not a fast truck. And have no desire to make it a fast truck. My question is what is a reasonable speed to drive without hurting the motor? I usually travel around 35-38 mph and have been told this is too fast. Thanks...

I have an early 30 AA with high speed rearend. When traveling down the road it will make a growling noise at 34 mph. The noise is gone at 35 Mph. It sounds like it may be coming from the transmission area, but it's hard to tell. Any ideas where I should start my search for the cause? Thanks Gary

I am looking for a high compression head for my early 30 AA.