You just labeled the years incorrectly. Those AL heads were on Vettes up to '91, not '93. The 113 is the correct casting number for the TPI heads. Since you have an '86, your stock TPI base will match up to the bolt pattern for the intake on those heads. They're a great upgrade over a standard L98 cast-iron head. If you do the 113 heads with a good roller cam and 355ci, you'll have a fun street motor with plenty of torque.
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Seeya,
Steve R. in North Jersey
'16 Go-Mango Dodge Charger R/T. It's so good to be back in a V8-powered, RWD car!
Former Toy - '88 Monte SS - had lots of mods...
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