this kit mounts the GM auto transmissions to the 4G63 in either the wide or narrow block version, it uses a Toyota starter from the 22RE engine and a 153 tooth GM flexplate readily available from any speed shop, they come with the coupler and the adapter plate
My first plate were 3/4 inch thick, the new plate will be closer to 1 inch


this is all cut to 2% oversize for the shrink that will take place during casting

I got the one piece GM adaptors worked out






these are the first heat treated couplers


I added some side mounting motor mounts in my latest designs, for guys that wanted a mid plate








