Manifold help

273-318 intake ports are smaller than a 340-360, the tabbies are for the intake gaskets at each end of the engine to hold them into place. make sure you use a .60 gasket set for aftermarket intakes . the dowels are locators for the intake. you need one for a 273-318 , edelbrock, weind etc. make good intakes for the SB LA engines. i think it will physically will bolt up and work, but i have never tried.