Yep, they do. I am looking at shifting at 5500 or below rpm, so I was thinking KB slugs would probably do ok. Even cast OE's 30 over should probably be ok. I am on a fairly tight budget, and I just want some added torque, and midrange power up to 5500 rpm. The XE 268 looks like it would provide what I am looking for. I am going to gasket match the ports as I believe anybody can can do that, but I won't be doing much in the way of the chamber, as I would really hate to screw anything up.
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