Is there any way other than casting numbers to check what size Olds I have? Its a pain to find the numbers because its in the car still. I never really hear anything about big blocks that arnt 455s though. Figured one of you motor heads would know if it had different freeze plugs or somthing. Oh, and off the top of your heads, can I just slap a Holley 4150 on the stock intake? Its a 59 Olds. Has all the "Rocket" emblems on it.