We know from official documents and photos that the following boats mounted the THUNDERBOLT operationally - PT556-559, 331, 174, 160. PT138 mounted one or two of the experimental versions stateside for a short period.

In the photos, the boat heading west is PT331 while that heading east is PT174 in 1945.

PT 331 definitely mounted a Thunderbolt.

The following is taken from Al Ross's work with John Lambert.It appears that there were 4 versions of the Thunderbolt, with the C-4 version put into production and fitted to PT 556-559(Ron 29). This version consisted of four 20mm Oerlikons. PT 160 mounted an experimental version with three Oerlikons and two .50cals. Some boats in RON 10(PT 163-174) and RON 21(PT 320-331) mounted Thunderbolts in the Southwest Pacific.
I'll keep looking for specific boat #'s.

Would recommend a book Allied Torpedo Boats by John Lambert and Les Brown.Excellent pics and text👍

Your best bet would be to consult the PT Boat forum, here: http://www.ptboatforum.com/cgi-bin/MB2/netboard.cgi?fid=102&cid=101&fct=gotoforum

The other is to consult one of Al Ross's and John Lambert's volumes of Coastal Forces. I think the volume covering ELCOs has quite a bit on it. If I have a moment later I'll check my copy for hull #'s.