/6 Possibilities

Most do have a suitable ported vac source. There are several sizes of them. They start at 1.08 and go to 1.21 venturi size. The slant will best accept the 1.08. The numbers are on the left side of the float housing and behind the accel pump link. Stay away from the 2150 series. If it has extra "stuff" on it, pass it up, ie: an appendage on the back(aneroid?), an extra-smaller choke shaft or little metering rod looking things in the venturi. Good hunting!