I was installing a cobra intake on my hipo motor from car 6S2227 and while in my 3rd and final round of tighten bolts the intake end broke. I was using a torque wrench, started at 12 lbs, then 20 lbs, last setting 26 lbs and the corner cracked. (See pic). What did I do wrong? I've installed 50 aluminum intakes in my life on 302's and never had this happen. Only saving grace, this was an aftermarket blue thunder intake.... not my original intake. Still I hate destroying my intake. Also this was my 1st time installing any intake on a 289 engine all my previous intakes are 302's. Prior installing intake i knew 289's have slightly shorter head mating surface, weaken mounting area, & exposing the bolt. But I assumed by following same torque sequence would work just fine. So before I destroy another intake please advise me what I did wrong? Lastly thank you for your assistance I've found this forum incredibly helpful and friendly. Fred
BTW - i can load more pictures of removed intake if helpful in diagnosing issue.