Porting small block 915 j-heads

Hi KMA, blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah blah, blah blah. "Insert lame emojis here" blah blah blah

Well said.