Not recommended!
Most handheld scanners do not handle preamps well. Second, the part of the band that you seek to amplify is way too close to UHF paging
(462 MHZ.) which is already loaded with intermod. Add to that problem, you driving by an area that is heavy with intermod, and you could desensitize your scanner completely. I would suggest trying different antennas before adding or switching to a preamp. Just my 2 cents worth from prior experience. Good Luck!
Manny