Intake Manifold leaks Coolant- Could it be too small??

I run an Edelbrock performer intake and seem to recall similar issue,it didnt :fit" as well as my Mopar cast iron one Like said I used silicone and proper tightening sequence and torque spec. i am not sure if the aluminum"flexes" when bolted down. I would think to a degree, but aluminum cracks also so you dont want to overtighten etc. Mine sealed up fine but i recall thinking it didnt sit right when i sat it on the engine dry without gaskets. maybe it is an aluminum intake commonality? or a defect?