I’ll pull the cover tomorrow on lunch break and snap you a pic.I hate to break it to you but that amp pictured most likely has two motorola mrf 455a stud mount transistors in it.
Couple versions, digital sports systems, cmi, all about the same.
It's not going to get close to that kind of output by any means.
If you pull the cover and take a picture of the board inside we can tell you the reasonable output of that amp.
73
Jeff