Your best bang for the buck is going to be to fully remove the bolt boss compared to leaving it intact, but reshaping it. Tom dyno tested that mod on several engines and saw no additional gains between the bolt boss untouched vs. tapered or "wing" shaped. So no, that mod doesn't give you any benefits. Try to find the thread for the 292 dyno tests, it has a wealth of info in it and can connect the dots to many questions you might have. Titen really should have made those and the 250 dyno tests a sticky because they keep getting lost in the archives.
