What size (length, thread, diameter) bolt is needed for the engine mounting bracket on a 76' GM 350 block ? To make a long story short, I work out of town and rebuild my blazer on the weekends so i didn't get to check on what size is needed. Would like to know, so I can pick up bolts at Fastenal before going back home. After next weekend it's been a little over a year since starting to restore my 73' k5 and almost everything mechanically will be rebuilt or brand new. Thanks - Joe.