No, the problem with the Monogram kit, beyond being 40+ years old, is that it is in 1/32 scale and the major scale for armor modeling is 1/35. Parts for those kits will be undersized and under scaled.
Any money spent for a pricey interior would be better spent put towards a superior kit.
I recently got the old Monogram M4A1 Calliope tank kit from the clearance aisle at Hobby Lobby. It is a nice nostalgia piece, but nothing really worth trying to upgrade.
That being said, the old Shep Paine inserts show how he made these into masterpieces. Not sure if he did an interior though.