Intake baffle
Have one in my car since the 90's. A rocker went south and that baffle kept the lifter in its bore. Same rockers too. They probably got the PAW catalog.
PAW catalog stops a 9mm, probably 45 too
If a pushrod touches that baffle you'll know it. Take apart and clearance, again :(
For it to work properly you should block the heat risers. Absolutely SUCKS for winter driving, but no more boiling fuel in the carb on hot days.
Just my opinion though