Trying to track down what the correct fan is for my 69 rag top with a 350 non a/c with the turbo 350 automatic.I have added the Vintage Air system and added a factory 19" 7 blade used clutch fan that blew up Monday.Was this fan to large for my 350,should I have used a 17 1/2" clutch fan?Inside shroud is 21".Trying to figure out why it blew up before restarting the engine.Engine mounts good,fan clutch good,has the 2 1/2" spacer appeared to sit well inside the shroud.Comments needed Please and Thanks.