My truck is a 52 chevy. I'm surprised someone else has a 50 Buick.
I have a 2dr slope back and a 4dr 50 Buick. The 2dr has a 3-spd, the 4dr has the dynaflop trans.
I haven't checked everywhere for those cyls., Carter don't have them,then I thought for longevity getting them lined with SS would be wiser in the long haul because the big problem area is the space between piston seal and the outer dust boot.
Dan