go google it there are no pontiac motors that are big blocks it is a common mistake that everyone makes cheak it out and tell me what you get i have a 403 it is not a big block i have a 400 it is not a big block i have a 455 and it is not a big block. i have a 1970 chevy chevelle and it is a 454...
go google it there are no pontiac motors that are big blocks it is a common mistake that everyone makes cheak it out and tell me what you get i have a 403 it is not a big block i have a 400 it is not a big block i have a 455 and it is not a big block. i have a 1970 chevy chevelle and it is a 454...