[napster1]

Originally Posted by Half-Inch Stud

30+ years ago, Slawco made my 48s do 550 HP (455+060) so 433 RA-IV doing as-posted here is low-risk port work.

Yes, a low-risk port job was done to preserve the 614 castings. I didn't want to run the risk of ending up with messed up heads like my previously purchased superduty number 16 heads. One of the previous owners really screwed up the port job to the point that too much material was taken out of the bowl area and results in negatively affecting air flow. The result was 520 hp and 578 tq on my 496 in my 1973 Trans Am. This 433 RA IV puts out estentially (sp) the same horsepower as my SD 496. I don't want to go through the hassel and expense of getting the SD heads fixed.