For Leif in Oakland:
Except for late model cars with overdrive automatics, I have never had a standard shift car that did much over 20 mph per 1000 rpms. If it did it had a 5th gear overdrive. If you will read any of the old road tests before 1972 20 mph per 1000 rpm was pretty much standard practice with all manufactors. That being the case then you drone down the highway at 3750 rpm at 70 mph, granted that would be too much for a flat head six but not for most modern engines. Now I think that you will find that the "Rice Rocket Motorcycles" drone down the highway at a much higher RPM than 3300 at 70 mph, as for as oil pressure my engine ran with 50 psi at 50 mph which is more than adaquate.
