I was recently at a car show and someone told me that back in the 60’s and 70’s an old trick was to take a 283 block with a 265 crank the high performance 327 heads he said that it would run at around 10 thousand rpm and push out an easy 375-400hp when built right. This makes sense to me (apart from the 10,000rpm) He did say that these engines did not last long but you can also find a lot of 283’s and 327’s in junk yards so I am thinking of trying it. I was wondering if anyone has ever done this or heard of it being done.