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I am looking for some info on a set of heads I have. I am rebuilding a 1968 383 and the heads that I got with them have a 250 casting number. I have done some googling and searched through old forums on here and all I know for sure is that they are 1968 383 only as the other big blocks got...

I recently spun a few bearings in my 440. I picked up most of a used 383 from a guy about a month ago and I'm now purchasing all the parts to put it together. The bottom end is all together, looks good, and turns over smoothly. I am about to purchase a cam to put in it and I was hoping to get...