This is an all new 383, maybe 800-1000 miles on it. It has always had good oil pressure. My gauge just works when it wants to. After it got past the point of clattering it ran fine untill I got to a lite and I had to keep it idled up just a little and when it did die it would crank right back up. It wasn't running hot. It started all this after I stopped and bought gas. That is the reason I thought it might have got some trash in it. The Edlebrock on it is about 10 years old and I had it on my 340 before I put it on this motor. It has never been apart since I bought it. Any ideals will really help, I have another show this next Sat. so I need to get it straightened out. Thanks Ronnie