Will the Rem chokes from a 1975 1100 fit a new 1100 classic trap

Depends. Some trap guns had the special competition RemChokes for the overbored barrels, and as such are not interchangeable with standard RemChokes. Danged f I can Remember the name for them at the moment. I believe the threads were at the front of the tubes, as opposed to standard RemChokes with the threads at the rear.