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Old 11-05-2012, 07:14 PM
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heres the possible combinations for a 87 iroc

87 IROC-Z A4 LB9 V8 9.3:1 5.0 (305) 190@4000 295@3200 TPI ---- ---- 2.73 3.23
87 IROC-Z M5,A4 LG4 V8 9.3:1 5.0 (305) 170@4400 250@2800 4bbl 3.23 ---- 2.73 ----
87 IROC-Z M5 LB9 V8 9.3:1 5.0 (305) 215@4400 295@3200 TPI 3.08 3.45* ---- ----
87 IROC-Z A4 L98 V8 9.3:1 5.7 (350) 225@4400 330@2800 TPI ---- ---- 3.27* ----


the lb9 is a tpi 305 , the lg4 is the carbed 305 ,and the l98 is the top of the line 350 with tpi
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