What's the RPM range for a 366 gasser? More specifically, what's the best "cruising" RPM to aim for? 2,000 3,000 4,000? I been googling like mad but the one website I found that I thought had the answer lost my faith when the last line of the page said, "The 366 is still in use today in such trucks as the Chevy 2500." If they don't know the old 366 big block and the newer LS based small block 6.0L were two completely different animals, I can't trust their info.