My 67 camaro has a 74 or 75, 350 in it that was just rebuilt last year. I bought it after the rebuild so I dont know what exactly he put in it.. It runs very well and hard but my question is that it will start out at 75 psi oil pressure or so (cold) and then gradualy drop to around 60 where it stays after it warms up. Is this normal for a new rebuilt engine? I this what high volume pressure pumps run at? Ive only got about 3000 miles on it.