I have been using a carb plate for 20 yrs. and most of the engines I've used it on had aluminum intakes and I've never had a failure. Of course I don't rely on 1/2" long bolts to secure the plate either. I always run studs in my aluminum intakes which increases load capacity. I've even used the carb plate on an iron headed 454 Chevy with an aluminum intake and there aren't many engines heavier than them.