Yes converters are GM style. I moved the started the right side so there would be less clutter on the left side. it is a GM flex plate with a 8 bolt mount and 6 bolt converter pattern. Used a minnie starter as a mock up starter and then replaced it with a better aftermarket version. Also had to change the pinion gear to a GM tooth count. The full diameter adapter between the crank and flex plate makes up for the .500" thick mid plate so no spacers are needed between the flex plate and converter