Yes, I believe you would have to dismantle at least part of it to tell. Involves drilling out a small passage. Holley's website has a lot of info. Get the carb. list no. off the upper right part of the air horn (stamped into metal). All the part sizes and rebuild kit etc. are listed here at this link. You just have to know the list number of your carb.
1988 Tristar 190 Sport, 351W w/GT-40's, 1:1 Velvetdrive