#1 is a lovely piece, but doesn't look like a Wisnewski engine. Looks more like a Wiley, but I wouldn't suggest that it is. Where your late friend lived might give a clue...Texas, So.Cal, Bay Area Cal., etc. Any idea about displacement?
#2 Is a McCoy .29 with a customized prop driver/spinner setup.
#3 The Fox is the '70's Fox .40 Stunt that GMA was said to have designed. It's a Schnuerle ported engine, and is said to do a very nice 4-2-4 without a lot of power and quite heavy.
#4 Sideport O&R. Looks like a .60, and in pretty good condition.
#5 For some reason, I keep thinking "Thunderbird .60", but I wouldn't put $ on that. Nice example, tho.
Somebody should have one of the model engine collectors books and be able to straighten out my fubars.
Steve