Alright, Im in a panic because I just had a horrible feeling I may have used a standard head gasket in a .030 over block. What would that do? Is that something that would be pretty noticeable during assembly that if I was paying attention at all I would have noticed? Will it cause the gasket to blow? I dont build engines so I wouldnt put it past myself, but I thought I was pretty careful about evrything and would like to think i didnt do this...but just in case id liek to know where I am now. Thanks guys.

 

you're fine.
what motor? generally the head gasket is much larger then the bore anyway (4.166" vs 4.030" for a 350), if it wasn't, and was undersized, (extremely rare, 4.0" gasket on a 4.030 motor..), you'd have seen it as you put it together.

 

Its a 350 block bored .030 over...