any OBS small block will have the two middle exhaust ports almost touching rather than evenly seperated like the LS and big block engines.
any OBS small block will have the two middle exhaust ports almost touching rather than evenly seperated like the LS and big block engines.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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