454 engine temp

[DSRGR@aol.com]

My tow vehicle, a 23 foot motorhome has a 454 chev engine. I recently had a 
small leak in the radiator repaired. In discussing operating temps with the 
repair guy, I mentioned that I had a good gauge installed and tried to keep 
the temp below 210 degrees by backing off when it got that high. HE said that 
modern engines run 225 as normal and that I shouldn't be so careful.... Whats 
the collective wisdom of this list on this subject.... Gene