Re: 77 Cheyenne meets Ramjet 350 by N2TRUX
The info you linked may be newer than my motor, but I'm pretty sure that was not there when we did the install on mine. I know it was not listed on any of the information when I did the research. Regardless, I can attest that I have never ran premium unleaded in mine, and it runs great. It might run better with higher octane fuel as Scot mentions, but we will probably never know.
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