ok i just bought an 89 iroc with a 305 tpi and 5 speed. my question is what rear do i have in it? and did all iroc come with rear disc or was it an option? does anyone know what the web address is to that camaro database thing.

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Brandon
"ScreaminDeamin 360"
350 60 over, TRW forged 9.83:1 pistons, crane cam 216/228 .484/.512, crane 1.6 RR's, ported plenum, home made ram air, 19 lb SVO injectors, crane AFPR

 

disk was an option on 305 cars, manditory on 350 cars

 

Count the bolts on the conver of the rear end, it should be 9. Then check the RPO code to find out what the ratio is.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Components, K&N Filters, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.32 @ 97.7mph
(corrected for elevation)