If you get a good one they will last for a long time. I run a CSI electric pump and have took it on a couple of 2 hour road trips with no problems. You just have to make sure that your charging system is up to the task at idle.
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79 hatch w/ NA 347,stage 2 Canfield heads, out of the box Victor 5.0 intake, solid roller cam, Aeromotive fuel system, proshifted TKO II.MY CAR
http://www.mustangworks.com/cgi-bin/...splay.cgi?1288
93lx all stock + tremec