In my opinion "lizard" anything over 140 would be impossible for a stock CRX SI. This guy obviously doesnt know that much about speed.
Do you get to inspect his car before his attempt.
175mph No Way!, 162mph No Way!
He would have to do major aero dynamic mods and power mods to reach 160+mph.
Should be easy money for you.

at least buy the guy a beer to ease his pain afterwords.
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88 mustang gt convertible bored to 306 BBk equal length headers mac cold air fender kit cowl hood nitto drag radials ford racing clutch flow masters h-pipe 160* thermostat 16 degrees of timing electric fan off 94' t-bird jacobs electronics cap and wires.
best 60 ft 2.14, best 1/8th 9.65, best 1/4 15.2 @89mph